Aaron (Aihran) of Aleth, Brittany, Hermit Aaron of Caerleon, Wales, Romano-Briton Soldier, Martyr Abban, Abbot of Magheranoidhe (aka Abban of New Ross), in Ireland Abdon, Martyr Abel, Archbishop of Rheims Abibon (Habib), youngest son of Gamaliel Abilius, 3rd Patriarch of Alexandria Abra, Daughter of St. Hilary, Bishop of Poitiers Abraham of Smolensk, Abbot Absalom of Cappadocia, Martyr Abundantius Abundinus, Martyr Abundius, Bishop of Como Abundius, Martyr Abundius of Rome, sewer worker, Martyr Acacius (Acathius) of Cappadocia, Soldier, Martyred in Byzantium Acathius, Martyr Acca, Abbot and Bishop of Hexham, Northumbria Acepsimas, Bishop of Hnaita, Western Persia, Martyr Acharius, Bishop of Noyon and Tournai, Belgium Achilleus of Rome, Praetorian Guard, Martyr Achius, Martyr Acindynus of Thrace, Martyr Acindynus, Persian Martyr Acislo, Martyr of Cordoba Adalar, Benedictine Companion of St. Boniface, Martyr Adalbald of Ostrevant, Martyr Adalbert (Voitech), Bishop of Prague and Martyr Adalgisus of Thierache, Irish Missionary Adam, Abbot of San Sabino Monastery in Fermo, Italy Adela, Matron, Mother of St. Trond Adelaide, Empress Adelfa Soro de Nuestra Senora del Rosario, Dominican Nun, Martyr Adelgunde (Aldegundis), Founding Abbess of Maubeuge Adeltrudis, Countess of Aurillac, Mother of St. Gerald Aderald of Troyes, Canon and Archdeacon Adolph, bishop of Osnabruck Adolph, Martyr Adrian III, Pope Adrian, Soldier and Martyr Adriana of Frisia, Virgin and Martyr Adulph, English Auxiliary Bishop of Maestricht Aelred (Ethelred) Cistercian, Third Abbot of Rievaulx, Yorkshire, England Aemiliana of Rome, Virgin, Aunt of Pope Gregory the Great Aemilianus, Irish Abbot of Legny Aemilius (Emilio), Martyr Aengus the Culdee, Author of the Martyrology of Tallaght Aetherius, Bishop of Vienne Aetherius, Martyr Afra, Virgin martyred at Augsburg Agabus of Antioch, New Testament Prophet Agabus, Bishop of Novara Agapit the Doctor (the Unmercenary), Monk of the Great Lavra of the Caves in Kiev Agapitus of Caesarea, Martyr Agapitus of Palestrina, Martyr Agapitus of Rome, Pope Agapitus, Bishop of Ravenna Agapitus, Martyr Agatha of Catania, Virgin and Martyr Agathangelus, Martyr Agatho, Pope Agathon the Wonderworker, Monk of the Great Lavra of the Caves in Kiev Agathonia, Martyr Agathonica (Agathonice) of Pergamum, first woman Martyr named by Eusebius Agathpodes, Deacon, Martyred in Thessaloniki Agberto Agilbert, Bishop of Angers Agileus, Martyred at Carthage Agilus (Ayeul), Abbot of Rebais (near Paris) Agnellus of Naples, Abbot Agnellus, Archbishop of Ravenna Agnes of Bagno di Romagna, Camoldolese Nun Agnes of Bohemia (Agnes of Prague), Princess and Poor Clare Abbess Agnes of Jesus Galand, Dominican Prioress of Langeac, Mystic Agnes of Montepulciano, Dominican Prioress Agnes of Poitiers, St. Radegund’s adopted daughter, 1st Abbess of Holy Cross Convent Agnes of Rome, Virgin and Martyr Agoardus, Martyr Agricola Agricola, Bishop (either of Avignnon or Nevers) Agricola, Martyr of Pannoia Agrippina of Mineo, Sicily, Virgin and Martyr Agrippina of Rome, Virgin and Martyr Agrippinus, Bishop of Naples Aibert, Benedictine Hermit Aidan, Bishop of Lindisfarne Ailbe, (Elvis) Irish Bishop of Emly Airald, Bishop of st. Jean-de-Maurienne Alain (Alan, Allen), Abbot of Lavaur in Gascony Alain de Solminiihac, Augustinian Bishop of Cahors Alaric of Ufnau, Swiss Priest and Hermit Alban, Soldier, Protomartyr of England Alberic Crescitelli, Italian Missionary, Martyred in China Alberic, Co-founder of the Cistercian Order Albert Avogadro, Patriarch of Jerusalem, Co-founder of the Carmelite Order Albert of Bergamo, Married, third order Dominican, Confessor Albert of Louvain, Cardinal Bishop of Liege, Martyr Albert of Trapani, Carmelite Priest Albert the Great, Dominican Bishop of Magdeburg and Doctor of the Church Albert, Count of Haigerloch Albertina Berkenbrock, Young Woman Martyred in Brazil Alberto Marvelli, Head of Catholic Action in Italy Albina of Formio, Virgin and Martyr Albina of Paris, Martyr Albinus (Albino), Bishop of Vercelli Alburga, First Abbess of Wilton Alcuin of York, Abbot of Tours, Head of Charlemagne’s School at Aachen Alda (Aude), disciple of St. Genevieve, Hermit Aldebrandus (Hildebrand) of Fossombrone, Abbot of Rimini Aldegonde, Virgin, Abbess of Mons, Sister of Waldetrude Aldegund (Adelgund), Foundress and First Abbess of Maubeuge, Hainault Aldhelm, Abbot of Malmesbury, Bishop of Sherborne, England Alena of Dielbeck, Brabant, Virgin and Martyr Alethe de Montbard deFontaine, Mother of St. Bernard of Clairvaux Alexander Akimetes (the Sleepless One), Founder of the Sleepless One monks Alexander Carbonera, Bishop and Martyr Alexander I, Pope and Martyr Alexander Nevsky, Greatest Hero of Rus’ Alexander of Carthage, Martyr Alexander of Drizipara (Thrace), Soldier and Martyr Alexander of Pydna, Macedonia, Soldier and Martyr Alexander Sauli, Bishop, Apostle of Corsica Alexander, Martyr Alexander, Martyr Alexander, Martyred at Antwerp Alexander, Patriarch of Alexandria Alexander, Patriarch of Constantinople Alexandra of Egypt, Solitary Alexis Falconieri, one of the Seven Holy Founders of the Servite Order Alexis of Rome, Confessor Alfons (Joseph) Maria Mazurek, Polish Carmelite Priest, Murdered by the Nazis Alfonso (Alphonsus) Pacecho, Jesuit Priest, Martyred in India Alfred Pampalon, Canadian Redemptorist Priest, patron of alcoholics and drug addicts Alfred the Great, King of Wessex Alfreda, Abbess of Crowland Alice of Scherbeck, Cisterician Nun Allaume of Burgos, French Soldier, Spanish Benedictine Alodia of Huesca, Martyr of Cordoba Aloysius (Luigi) Guanella, Priest, Founder of the Servants of Charity and the Daughters of St. Mary of Providence Aloysius Gonzaga, Jesuit Novice Alphaeus of Caesarea in Palsetine, Martyr Alphonsa Muttathupadathu, Poor Clare Nun, first canonized Indian saint Alphonsus (Alonzo) Rodriguez, Jesuit Lay Brother Alphonsus Maria de Liguori, Bishop and Doctor of the Church, Founded the Redemptorists Altfrid (Alfred), Bishop of Hildesheim Altmann, Bishop of Passau Alto Alvaro of Cordoba, Dominican Prior Alypius, Bishop of Tagaste in North Africa Amadeus IX, Duke of Savoy Amalia (Amalburga), Abbess of Rodin Amand (Amandus), Bishop of Bordeaux Amand (Amandus), Bishop of Maestricht, Apostle to Flanders Amand (Amandus), Bishop of Rennes, Brittany Amandus, Bishop of Worms Amantia, Martyr Amantius, Bishop of Como Amasius, Bishop of Teano, Italy Amata, Martyr Amator, Martyred in Alexandria Amatus, Solider, Martyred at Nyon (Neuss) on Lake Geneva, Switzerland Ambrose (Edward) Barlow, English Benedictine Monk, Martyr Ambrose, Bishop of Milan and Father of the Church Amelberga (Amalberga) of Rodin, Flanders, Virgin Amon, Egyptian Abbot Ampelius, Egyptian Hermit, Patron of Blacksmiths Anacleto Gonzalez Flores, Mexican Layman, Cristero Martyr Anacletus, Pope and Martyr Ananias (Hananiah) of Damascus, Bishop and Martyr, who baptized St. Paul Anastasia of Rome, Virgin and Martyr Anastasia of Sirmium, Virgin and Martyr Anastasia the Patrician of Constantinople, Hermitess Anastasius I, Patriarch of Antioch Anastasius the Persian, Martyr Anastasius XVIII, Archbishop of Sens Anastasius, Bishop of Brescia Anastasius, First Archbishop of Hungary, Friend of St. Stephen of Hungary Anastazja Mieszkowna of Poland, Duchess of Pomerania Anathoile-Francoise Thoulier, Poor Clare Mystic Anatolia of Thora, on Lake Velino, Italy, Martyr Anatolianus Anatolius, Bishop (either of Constantinople or of Laodicia) Anatolius, Bishop of Milan Andre (Arnold) Bessette, Canadian Holy Cross Brother Andrea Dotti, Servite Priest Andreas Sola y Molist, Mexican Claretian Priest, Cristero Martyr Andrei Rublev, Russian monk, great Iconographer Andrew Avellino (baptized “Lancelot”), Theatine Priest Andrew Bobola, Jesuit Priest, Martyr Andrew Calibita Andrew Corsini, Carmelite Bishop of Fiesole Andrew Hubert Fournet, Priest, Co-founder of the Daughters of the Cross Andrew Kim Taegon, Jesuit Priest, First Korean Priest, Martyr Andrew of Montereale, Augustinian Priest Andrew Phu Yen, Catechist, Protomartyr of Viet Nam Andrew the Apostle Andrew, Archbishop of Crete Andronicus, Martyr Andronikos, husband of Athanasia Anectus of Cesarea, Martyr Angadrisma, daughter of Bishop Robert I of Tours, Abbess of Oroce-des-Vierges Angela Merici, Foundress of the Ursulines Angela of Foligno Angela of the Cross, Spanish Carmelite Mystic Angelico (Fra Angelico), (Fra Giovanni da Fiesole, born Guido di Pietro) Dominican Renaissance artist Angelina, Despotissa, Albanian Queen of Serbia, Matron Angelo Agostini Mezzinghi, Carmelite Priest Angelo of Furcio, Augustinian Priest Angelo Paoli, Carmelite Priest Angelus (Angelo) of Jerusalem (of Sicily), Carmelite Martyred in Sicily Angus McNisse (Macinisius), 1st Bishop/Abbot of Kells, appointed by St. Patrick Anianus (Aignan), Bishop of Orleans, Confessor Anianus, Second Patriarch of Alexandria Aniceto Adolfo (Manuel Seco Guitierrex), Christian Brother, Martyr of Turon Anicetus, Pope Ann Lyne, Martyred under Queen Elizabeth I Anna Maria Taigi, Widow, Prophet Anna Schaeffer, Bavarian Mystic and Stigmatic Anna, Grand Duchess of Novgorod, Grand Princess of Kiev Anne Catherine Emmerich, Augustinian nun, ecstatic, stigmatic Anne of St. Bartholomew, dear friend and secretary of Teresa of Avila Anne, Mother of Our Lady Anne-Marie Javouhey, Nun, Foundress of the Institute of St. Joseph of Cluny Annibale (Hanibal) Maria di Francia, Priest, Servant of the Poor Anno II, Archbishop of Cologne Anonimus, Martyr Anselm, Abbot of Fanano Anselm, Abbot of Nonatola Anselm, Archbishop of Canterbury and Doctor of the Church Anselm, Martyr Ansfrid, Count and Bishop of Utrecht Ansgar (Oscar), Archbishop of Bremen, Apostle to Scandinavia Ansovinus, Bishop of Camerino Ansurio (Iscarus), Bishop of Orense, Spain Anthelm, Carthusian Bishop of Belley Anthimus of Rome, Priest and Martyr Antholin (Anatolianus) of Palmiers, Martyr Anthony Baldinucci, Jesuit Priest, Preacher of Missions Anthony Claret, Archbishop of Havana and Founder of the Claretians Anthony dei Vici, of Stroncone, Franciscan Lay Brother Anthony Fernandez, Jesuit Lay Brother Anthony Francisco, Jesuit Priest, Martyred in India Anthony Maria Pucci, Confessor Anthony Maria Zaccaria, Priest, Founder of the Barnabites Anthony Mary Gianelli, Bishop of Bobbio Anthony Neyrot, Dominican Priest, Martyr Anthony of Amandola, Augustinian Priest Anthony of Kiev, Co-Founder of Kiev’s Monastery of the Caves Anthony of Lerins, Hermit Anthony of Padua, Franciscan Priest Anthony the Great of Egypt, Abbot Anthony Turner, English Jesuit Priest, Martyr Anthony, Abbot of Siya, Novgorod Anthusa of Constantinople, Princess, Founding Abbess of the Omona Monastery Anthusa of Mantinea, Byzantine Abbess Antiochus of Anastasiopolis, Martyr Antipas, First Pishop of Pergamon, martyr mentioned in Revelation 2 Antoine Chevrier, Priest, Founder of the Institute of the Prado Antoine Daniel, Jesuit Priest, One of the North American Martyrs Antonia of Florence, Poor Clare Antonia, Martyr Antonina of Nicaea, Martyr Antoninus, Archbishop of Milan Antoninus, Dominican Archbishop of Florence Antonius, Martyr Aphraates (Pharhadh) Persian Sage, Bishop Aphrodise (Aphrodisius), First Bishop of Beziers, Martyr Apollinaris Syncletica of Egypt, Virgin Apollinaris, Bishop of Hierapolis Apollinaris, First Bishop of Ravenna and Martyr Apollonia of Alexandria, Virgin and Martyr Apollonius of Alexandria, Priest, Martyr Apollonius the Apollogist, Roman Senator and Martyr Apotheme (Apothemius), Bishop of Angers Apphianus of Casearea, Martyr Apuleius of Rome, Martyr Aquila, Disciple of Paul, Martyr Aquillina of Byblos, Virgin and Martyr Aquillinus, Bishop of Evreux Arcacius, Bishop of Militene, Armenia Archangela Girlani of Mantua, Carmelite Mystic Archangelo Canetuli, Augustinian Canon, died as Archbishop-elect of Florence Aretas of Najran, Arabia, Martyr Arialdo da Carimate of Milan, Deacon and Martyr Arialdus, Deacon and Martyr Aristides of Athens, Apologist, Martyr Aristo of Alexandria, Priest, Martyr Ariston of Porto, Martyr Armel of Brittany, Abbot of Saint-Armel-des-Boscheaux and Plou-Remel Monasteries Armentarius, Bishop of Pavia Arminius, Martyred with his mother in Egypt Armogastes, Vandal Courtier, Martyr Arnold (Arnulph), Bishop of Soissons Arnold Janssen, Priest, Founder of the Divine Word Missionaries Arnulph, Bishop of Metz Arquimimus, Vandal Companion of Armogastes, Martyr Arsenius the Great, Roman Deacon, Imperial Tutor, Hermit in Egypt Artaldus, Bishop of Belley Artemas, Martyred in Puozzoli Artemis the Great, Martyr, Arian prefect of Egypt; persecuted St. Athanasius Artemius of Antioch, Soldier, Megalomartyr Arthemia, Martyr Asaph, Bishop of St. Asaph, Wales Asella of Rome, Virgin and Hermitess Aspren, First Bishop of Naples Aspretanus, Bishop of Naples Assicus (Asaco), Bishop of Elphin, Roscommon, Ireland Associatus, Martyr Associatus, Martyr Assunta Marchetti, foundress of the Missionary Sisters of St. Charles Borromeo (Scalabrinian Sisters) Assunta Maria Pallotta, Nun, Missionary to China Asteria of Bergamo, Virgin and Martyr Asterius of Ostia, Martyr Asterius, Bishop of Petra, Arabia Athanasia, Martyr Athanasia, wife of Andronikos Athanasios of Athos, Monk, Founder of Mount Athos Athanasius, Patriarch of Alexandria and Father of the Church Athenodorus of Mesopotamia, Syrian Monk, Martyr Atilano Cruz Alvarado, Mexican Priest, Cristero Martyr Atilano, First Bishop of Zamora Attala, Alsatian Abbess Attalus, Second Abbot of Bobbio Atto, Bishop of Pistoia, Italy Attracta (Adracht) Killlaraght, Irish Abbess Aubin (Albinus), Bishop of Angers Audactus, Martyr Auditor, Confessor, Companion of St. Austremonius Audomarus (Omer), Bishop of Thérouanne Auguso Andres (Roman Martinez Fernandez), Christian Brother, Martyr of Turon Augusta of Rome, Empress and Martyr Augustin Caloca Cortes, Mexican Priest, Cristero Martyr Augustina Pietrantoni, Sister of Charity, Murdered at Santo Spirito Hospital, Rome Augustine Webster, Carthusian Prior of Axholme, Martyr Augustine, Archbishop of Canterbury Augustine, Bishop of Hippo and Father of the Church Augustus (Augustine) Tolton, African American Chicago Priest Augustus, Martyr Aurea (Chryse) of Ostia (of Rome), Virgin and Martyr Aurea (Oria) of San Millan, Spanish Anchoress Aurea of Cordoba, Virgin and Martyr Aurelia of Strasbourg, Virgin and Hermitess Aurelia, Virgin and Martyr Aurelius of Cordoba, Martyr Aurelius, Bishop of Carthage, Martyr Aurelius, Bishop of LePuy Aurelius, Martyr Aurora, Virgin and Martyr Austindus, Bishop of Auch Austreberta, Benedictine Abbess of Pavilly, Normandy Austregisil (Outrille), Bishop of Bourges Austremonius, Bishop and Martyr, Apostle to Auvergne Austrufle, Abbot of Fontenelle Autbert, Bishop of Avranches Auxentius of Bithynia, Syrian Hermit Aventor, Martyr, Patron of Turin Avertanus, Carmelite Lay Brother Avertinus of Troyes Avertinus of Vencay, English Gilbertine Hermit (friend of Thomas a Becket) Avitus, Bishop of Vienne Avitus, Martyr Aya, Matron, patroness of lawsuits Azarias, Martyr Azelia (Zelie) Guerin Martin, Mother of St. Therese of Lisieux