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1868–1940 · Contemporary · Third Order of Saint Dominic

María Ascensión Nicol y Goñi, O.P., (14 March 1868 – 24 February 1940) was a Spanish Roman Catholic religious sister of the Third Order of St. Dominic.

384 · Early Church

Saint Ascholius (Ἀσχόλιος, d. 383/4) was Bishop of Thessalonica from AD 379 until his death, at the time of the adoption of Christianity as the state religion of the Roman Empire. He baptized Emperor Theodosius I.

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Asclepius is a hero and god of medicine in ancient Greek religion and mythology. He is the son of Apollo and Coronis, or Arsinoe, or of Apollo alone.

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Saint Asclepius of Limoges was a prelate who served as a bishop. He is recognized as a saint within the Catholic Church.

334–406 · Early Church

Saint Asella, also known as Osella and Ocella (c. 334–c. 406), was a Roman virgin and hermit who was a disciple and friend of Saint Jerome, who spoke of her in his writings.

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Ashkhen (Armenian: Աշխէն, flourished second half of the 3rd century & first half of the 4th century) was the Queen of Armenia and a member of the Arsacid dynasty by marriage to King Tiridates III of Armenia. Ashkhen was a monarch of Sarmatian origins.

800–826 · Medieval

Ashot I the Great (Georgian: აშოტ I დიდი ashot I didi) (died 826/830) was a presiding prince of Iberia (modern Georgia), first of the Bagratid family to have attained to this office c. 813.

100–200 · Early Church

Aspren or Asprenas (Italian: Sant'Asprenato, Sant'Aspreno, Sant'Aspremo) was a 1st-century Christian saint and venerated as the first Bishop of Naples.

1245 · Medieval

Assalone of Capodistria was a Catholic priest and Roman Catholic Bishop of Capodistria who held citizenship in the Republic of Venice. Born in Koper, he died there in 1245. He is recognized as a blessed.

490 · Early Church

Assicus (Asicus, Assic) was the first bishop of Elphin, Ireland, and venerated as the patron saint of that place. He was also an artisan metalworker. Assicus was a friend of St. Patrick, and a skilled metal worker in brass and copper.

1871–1948 · Contemporary

Assunta Marchetti, SS (15 August 1871 – 1 July 1948) was an Italian Catholic who cofounded of the Missionary Sisters of Saint Charles Borromeo. She worked in Brazil from 1895 until her death. Her priest brother Giuseppe is titled as Venerable on the path to sainthood.

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Grata of Bergamo (early 4th century) is an Italian saint and martyr, and sister of Asteria of Bergamo. Her parents were Saint Lupo of Bergamo and Saint Adelaide, duke and duchess of Bergamo. According to hagiographer Agnes B.C.

335–410 · Early Church

Saint Asterius of Amasea (Greek: Ἀστέριος Ἀμασείας, c. 350 – c. 410 AD) was made Bishop of Amasea between 380 and 390 AD, after having been a lawyer. He was born in Cappadocia and probably died in Amasea in Pontus, now in Turkey.

262 · Early Church

Asterius of Caesarea was a Roman senator who became a Christian martyr. After Asterius gave a Christian burial to the Roman soldier Marinus of Caesarea, who suffered martyrdom, he too was condemned to death and beheaded.

223 · Early Church

Asterius of Ostia (d. 3rd century AD) was a martyred priest venerated as a saint in the Catholic Church. Information on him is based on the apocryphal Acts of Saint Callixtus.

365 · Early Church

Asterius of Petra was a convert from Arianism, and later the Bishop of Petra. Asterius was one of the defenders of the Council of Nicæa and St. Athanasius. At the Council of Sardica, in 343, Asterius denounced Arianism, as a heresy.

100–117 · Early Church

Astius (died AD 98 AD; Albanian: Asti, Greek: Άστιος) is a 2nd-century Christian martyr venerated by the Roman Catholic and Eastern Orthodox churches. He was the bishop of Dyrrhachium (now Durrës in Albania).

955–1030 · Medieval · Benedictines

Saint Astrik of Pannonhalma (also known as Anastasius, Astericus, Ascrick, Astrissicus) (died c. 1030/1040) is a saint of the 11th century. Radla was a Czech or Croat from Bohemia, who was a monk in Hungary.

350–412 · Early Church

Asturio Anulino Serrano (Villaseca de la Sagra, 4th century – Complutum, c. 412) was a bishop of the Diocese of Toletum (395–412) and the first bishop of the Diocese of Complutum (412–). He is venerated as a saint by several Christian denominations.

1911–1936 · Contemporary · Missionary Sons of the Immaculate Heart of Mary

Atanasio Vidaurreta Labra (Adiós, May 2, 1911 – Barbastro, August 18, 1936) was a Spanish religious, martyred in Barbastro during the Spanish Civil War and venerated as a blessed by the Catholic Church.

1741–1801 · Modern

Atanazy was an Eastern Orthodox priest and bishop born in 1741 in the Russian Empire. He died in 1801 and is recognized as a prelate.

1670 · Reformation

Saint Athanase de Kios was born in Gemlik and was a citizen of the Ottoman Empire. He died by decapitation in 1670.

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Athanasia is a genus of flowering plants in the daisy family. Athanasia is native to southern Africa. The name is derived from the Greek a-, 'without', and thanatos 'death', alluding to the persistent dry involucral bracts.

701–860 · Medieval

Athanasia of Aegina (c.790 in Aegina – 15 August 860 in Timia, Greece) was a Byzantine saint and abbess. Athanasia's hagiographer called her "this praiseworthy woman, who bears the name of immortality, who lived her life admirably".

1597–1654 · Reformation

Athanasius III of Constantinople (Greek: Ἀθανάσιος; born Alexios Patellarios, Ἀλέξιος Πατελλάριος; Russian: Алексий Пателла́рий; 1597 – 5 April 1654) was the Ecumenical Patriarch of Constantinople in 1634 and 1652.

830–872 · Medieval

Saint Athanasius I (c. 832 – 872) was the bishop of Naples from 850 to his death. This Athanasius should not be confused with his nephew, Athanasius II.

1230–1310 · Medieval

Athanasius I of Constantinople (Greek: Ἀθανάσιος; c. 1230 – 28 October 1310) was the Ecumenical Patriarch of Constantinople for two terms, from 1289 to 1293 and from 1303 to 1309. He was born in Adrianople and died in Constantinople.

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Athanasius II of Constantinople (Greek: Ἀθανάσιος) is reckoned as the last Ecumenical Patriarch of Constantinople before the Fall of Constantinople.

296–373 · Early Church

Athanasius I of Alexandria (c. 296–298 – 2 May 373), also called Athanasius the Great, Athanasius the Confessor, or, among Coptic Christians, Athanasius the Apostolic, was a Christian theologian and the 20th patriarch of Alexandria (as Athanasius I).

1597–1648 · Reformation

Athanasius of Brest (Russian: Афанасий Брестский, Belarusian: Афанасій Брэсцкі) (died September 5, 1648) is a saint and hieromartyr of the Russian Orthodox Church and the Polish Orthodox Church. He was killed by Catholics for opposition to the Union of Brest.

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Saint Athanasius, of unknown birth and death date and place, is according to tradition the first bishop of Zaragoza, serving from the year 39 until 59, when he was martyred near the city by troops of Nero who had come in search of him.

820 · Medieval

Saint Athanasius was born in Catania in 820. He is recognized as a saint.

451 · Early Church

Athanasius (Jerusalem?, 5th century – 451 or 452) was a deacon of Jerusalem who was killed for defending the decisions of the Council of Chalcedon. He is venerated as a saint by the Orthodox and Catholic Churches.

920–1000 · Medieval

Athanasius the Athonite (Greek: Ἀθανάσιος ὁ Ἀθωνίτης; c. 920 – c. 1003), was a Byzantine monk who is considered the founder of the monastic community on the peninsula of Mount Athos, which has since evolved into the greatest centre of Eastern Orthodox monasticism.

1302–1380 · Medieval

Athanasius the Meteorite (Greek: Αθανάσιος ο Μετεωρίτης; 1302–1380) was a 14th-century Christian monk. He is canonized as a saint by the Eastern Orthodox Church. His feast day is celebrated on April 20.

1176 · Medieval

Athanasius of the Kiev Caves, also known as Athanasius the Recluse (died c. 1176), was an Orthodox saint and a monk of the Kiev Pechersk Lavra. Information about his life is scarce and comes primarily from his biography in the Kiev Caves Patericon.

801–926 · Medieval

Athelm (or Æthelhelm; died 8 January 926) was an English churchman, who was the first Bishop of Wells, and later Archbishop of Canterbury. His translation, or moving from one bishopric to another, was a precedent for later translations of ecclesiastics, because prior to this time…

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Athenagoras was an Ante-Nicene Church Father, a Christian apologist who lived during the second half of the 2nd century of whom little is known for certain, besides that he was Athenian (though possibly not originally from Athens), a philosopher, and a convert to Christianity.

215–270 · Early Church

Athenodorus of Neocaesarea, born around 215 in Neocaesarea (Eastern Roman Empire) and died in 270 in the same city, was a Christian, bishop of the city, and brother of Gregory the Thaumaturge.

550 · Medieval

600–600 · Medieval

Athracht (Modern Irish Naomh Athracht; in Latin sources Attracta) is the patron saint of the parish of Locha Techet (Lough Gara) and Tourlestrane, County Sligo, Ireland. She was a sister of Bishop Conal of Drumconnell. Her feast day is 11 August.

741 · Medieval

Abbess and saint

501–627 · Medieval

Attala or Atala (died 622) was a disciple of Columbanus and his successor as abbot of Bobbio from 615. Attala was originally from Burgundy, and first became a monk at the abbey of Lérins.

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Saint Attalus died in Catania. He is recognized as a saint.

850–919 · Medieval · Benedictines

Attilanus (Atilanus, Aragonese: Sant Atilano) (937–1007) was an Aragonese Benedictine and bishop of Zamora. He was prior of Moreruela Abbey. Saint Atilan (Attilanus), bishop of Zamora (Oct. 5, 10th century).

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Attilio, one of the legendary martyrs of the Theban Legion, is venerated as a saint in the area of Trino Vercellese, in Piedmont, north-west Italy and commemorated on 28 June.

1913–1972 · Contemporary

Attilio Giordani A.S.C. (13 February 1913 – 18 December 1972) was an Italian Roman Catholic and member from the Association of Salesian Cooperators. Giordani studied in Milan where he encountered the Salesians of Don Bosco alongside his brother Camillo.

1070–1153 · Medieval · Benedictines

Atto of Pistoia, or Saint Atto (Portuguese: Santo Atão; c. 1070 – 22 May 1153), was a Catholic bishop and a professed member from the Vallumbrosan Order as well as the Bishop of Pistoia and a noted historiographer. Atto was born around 1070.

1044 · Medieval · Benedictines

Ató of Oña or Adó (in Latin Atto or Attus, in Spanish Atón; Aragon or Catalonia, second half of the 10th century – Oña, Burgos, c. 1044) was an Aragonese bishop who retired as a hermit to the Monastery of San Salvador de Oña. He is venerated as a saint by the Catholic Church.

660–725 · Medieval

Saint Aubert, also known as Saint Autbert, was bishop of Avranches in the 8th century and is credited with founding Mont Saint-Michel. Aubert lived in France during the reign of Childebert III (695-711) and died about 720.