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385 · Early Church

Saint Illidius (French: Saint Allyre, Alyre; died 385) was a 4th-century bishop of Clermont, France. To Illidius is attributed the rise of Clermont-Ferrand as a center of religious teaching and culture. Gregory of Tours mentions Illidius in his work.

1280 · Medieval · Franciscans

Illuminatus of Arce (Italian: Illuminato dell'Arce) or Illuminatus of Rieti (Illuminato da Rieti) was an earlier follower of Francis of Assisi.

1000–1076 · Medieval

Emad (also transliterated as Imad, Imed and Aimad; Arabic: عماد) is an Arabic masculine given name and surname and means "support" or "pillar".

1322–1333 · Medieval · Nuns of the Order of Preachers

Imelda Lambertini (1322 – 12 May 1333) was an Italian Catholic mystic and devotee of the Dominican Order. She is the patroness of First Communicants and many dioceses make use of her feast as a day to schedule First Communions and Confirmations.

605 · Medieval

Ingenuinus or Ingenuin, also Jenewein (d. c. 605), was the second historically confirmed bishop of Sabiona or Säben. He is venerated as a saint. Little is known of his life. He was probably bishop of Sabiona from 577 to his death in about 605 and of Roman descent.

1887–1934 · Contemporary · Passionists

Inocencio of Mary Immaculate, CP (10 March 1887–9 October 1934), born Manuel Canoura Arnau, was a Catholic priest and member of the Passionists who was killed during the Asturias revolt. He and his companions are known collectively as the Martyrs of Turon.

400–417 · Early Church

Pope Innocent I (Latin: Innocentius I) was the bishop of Rome from 401 to his death on 12 March 417. From the beginning of his papacy, he was seen as the general arbitrator of ecclesiastical disputes in both the East and the West.

1225–1276 · Medieval · Dominican Order

Pope Innocent V (Latin: Innocentius V; c. 1225 – 22 June 1276), born Pierre de Tarentaise, was head of the Catholic Church and ruler of the Papal States from 21 January to 22 June 1276. A member of the Order of Preachers, he acquired a reputation as an effective preacher.

1611–1689 · Reformation · Servite Order

Pope Innocent XI (Latin: Innocentius XI; Italian: Innocenzo XI; 16 May 1611 – 12 August 1689), born Benedetto Odescalchi, was head of the Catholic Church and ruler of the Papal States from 21 September 1676 until his death on 12 August 1689.

285–353 · Early Church

Innocentius of Tortona was a Catholic priest and bishop born in Tortona in 285. A citizen of Ancient Rome, he died in 353. He is recognized as a saint by the Catholic Church.

1589–1655 · Reformation · Order of Friars Minor Capuchin

Giuseppe Marcinò (24 October 1589 – 16 November 1655), religious name Innocenzo of Caltagirone, was an Italian priest and a member of the Capuchins. He was well known for his frequent and often sensational predications and miracles attributed to him since 1623.

1844–1890 · Modern · Order of Friars Minor Capuchin

Innocenzo da Berzo (19 March 1844 - 3 March 1890), born Giovanni Scalvinoni, was an Italian Roman Catholic priest and a professed member of the Order of Friars Minor. Scalvinoni assumed his new religious name upon his profession as a Capuchin friar.

1526–1570 · Reformation · Society of Jesus

Inácio de Azevedo, SJ (1526–1570) was a Portuguese Jesuit missionary. He is one of the Forty Martyrs of Brazil, beatified by Pope Pius IX in 1854. He was born Dom Inácio de Azevedo de Ataíde Abreu e Malafaia in the city of Porto, probably in the first quarter of the year 1526.

1587–1622 · Reformation

Agnes Takeya (イネス竹屋; 1580–1622) was a Korean-Japanese Roman Catholic martyr. Takeya was born in Korea in 1580. During the 1592–1598 Japanese invasions of Korea, she was kidnapped, enslaved, and taken to Japan. There, she was converted to Christianity.

1880–1959 · Contemporary

Ioan Bălan (11 February 1880 – 4 August 1959) was a Romanian bishop of the Greek-Catholic Church. He is venerated as a Blessed in the Roman Catholic Church. He was born in Teiuș, Alba County, the son of Ștefan Bălan and Ana, née Muntean.

1907–1953 · Contemporary

Ioan Suciu (December 4, 1907 – June 27, 1953) was a Romanian bishop of the Greek Catholic Church, born into a clerical family in Blaj. Suciu studied in Rome, Italy first at Sant'Atanasio and then at the Pontificium Institutum Internationale Angelicum, the future Pontifical Unive…

1565–1619 · Reformation

Ippolito Galantini (14 October 1565 – 20 March 1619) was an Italian Roman Catholic and the founder of the Congregation of Christian Doctrine. Galantini became a noted educator in Florence and Pope Leo XI dubbed Galantini as the "Apostle of Florence" due to his activism in educati…

349–379 · Early Church

Irene of Rome (also Erena, Hirena, and Heira; born c. 349/350; died c. 379, buried in Rome) is venerated as a virgin and saint in the Catholic and Orthodox Churches. Her feast day is February 21. She is said to have been the sister of Pope Damasus I.

1891–1930 · Contemporary

Irene Stefani, IMC (born Aurelia Mercede Stefani; 22 August 1891 – 31 October 1930) was an Italian religious sister of the Consolata Missionaries.

300–304 · Early Church

Saint Irene of Rome (died 288 AD) was a Christian woman in the Roman Empire during the reign of Diocletian. She was the wife of Saint Castulus. According to Christian legend, she attended to Saint Sebastian after he was wounded by Mauretanian archers.

1914–1992 · Contemporary · Franciscans

Dulce de Souza Lopes Pontes, SMIC, widely known as Irmã Dulce ("Sister Dulce") and also as Saint Dulce of the Poor (born Maria Rita de Souza Pontes; 26 May 1914 – 13 March 1992), was a Brazilian Missionary Sister of the Immaculate Conception of the Mother of God.

1607–1646 · Reformation · Society of Jesus

Isaac Jogues SJ (10 January 1607 – 18 October 1646) was a French missionary and martyr who traveled and worked among the Iroquois, Huron, and other Native populations in North America.

1819–1888 · Modern · Congregation of the Most Holy Redeemer

Isaac Thomas Hecker (December 18, 1819 – December 22, 1888) was an American Catholic priest and founder of the Paulist Fathers, a North American religious society of men. Hecker was originally ordained a Redemptorist priest in 1849.

1836–1899 · Modern

Isabel de Larrañaga Ramírez, HCSCJ (19 November 1836 - 17 January 1899), religious name Isabel of the Heart of Jesus, born in Manila, was a Filipino religious sister.

1842–1911 · Contemporary

Madre Isabella de Rosis (1842–1911) was an Italian religious sister and foundress of the congregation of the Reparatrix Sisters of the Sacred Heart. In December 2005, Pope Benedict XVI proclaimed her as a Venerable Servant of God, the first step on the road to canonization.

1451–1504 · Reformation

Isabella I (Spanish: Isabel I; also known as Isabella the Catholic Spanish: Isabel la Católica; 22 April 1451 – 26 November 1504) was Queen of Castile and León from 1474 until her death in 1504.

980–1048 · Medieval · Benedictines

Isarn de Sant Víctor was a Benedictine monk born in 980 who served as the abbot of Saint-Victor of Marseille. He died in 1048 and is recognized as a saint within the Catholic Church.

1200–1204 · Medieval · Premonstratensians

Isfrid of Ratzeburg was a Premonstratensian Prince-Bishop of Ratzeburg. Isfrid was a professed canon of the Cappenberg monastery in Westphalia. In 1159, Isfrid was appointed the Provost of Jerichow. There he finished construction of the Romanesque collegiate church of St.

1887–1909 · Contemporary · Carmelites

Isidore Bakanja (c. 1880–1890 – 15 August 1909) was a Congolese Catechist who was killed by a plantation agent. He was beatified by Pope John Paul II in 1994. Isidore Bakanja, a member of the Boangi tribe, was born in Bokendela, Congo Free State, between 1880 and 1890.

370–440 · Early Church

Isidore of Pelusium (Ancient Greek: Ἰσίδωρος ὁ Πηλουσιώτης, d. c.450) was born in Egypt to a prominent Alexandrian family. He became an ascetic, and moved to a mountain near the city of Pelusium, in the tradition of the Desert Fathers.

1881–1916 · Contemporary · Passionists

Isidore De Loor (18 April 1881 – 6 October 1916), also known by his religious name Isidore of Saint Joseph, was a Belgian professed religious from the Passionists.

560–636 · Medieval

Isidore of Seville (Latin: Isidorus Hispalensis; c. 560 – 4 April 636) was a Hispano-Roman scholar, theologian and archbishop of Seville. He is widely regarded, in the words of the 19th-century historian Charles Forbes René de Montalembert, as "the last scholar of the ancient wor…

1890–1936 · Contemporary

Isidoro Bover Oliver (born May 2, 1890, in Vinaròs, died October 2, 1936, in Castellón de la Plana) was a blessed priest, a victim of anti-Catholic persecution during the Spanish Civil War, murdered in hatred of the faith (odium fidei) and recognized by the Catholic Church as a m…

1902–1943 · Contemporary

Isidoro Zorzano Ledesma (13 September 1902 – 15 July 1943) was a Spanish Catholic layman who was a member of Opus Dei. Zorzano was a naturalized Argentine due to being born in Buenos Aires, though upon his relocating to Spain he met and befriended Fr Josemaría Escrivá and soon j…

1872–1950 · Contemporary

Ismael Perdomo Borrero (22 February 1872 - 3 June 1950) was a Colombian Roman Catholic prelate who served as the Archbishop of Bogotá from 1928 until his death.

1244 · Medieval · Dominican Order

Isnardo da Chiampo, OP (d. 19 March 1244) was an Italian Catholic priest and professed member in the Order of Preachers. He studied in Bologna (where Dominic of Osma himself received him into his order) and in Milan before preaching in northern Italian cities such as Brescia and…

1914–1953 · Contemporary · Salesians of Don Bosco

István Sándor (26 October 1914 – 8 June 1953) was a Hungarian Salesian and labourer, martyr and Blessed. István Sándor was born in Szolnok in 1914, the first year of the First World War.

1904–1957 · Contemporary · Benedictines

Itala Mela (28 August 1904 – 29 April 1957) was an Italian Roman Catholic theologian and mystic who was a lapsed Christian until a sudden conversion of faith in the 1920s and as a Benedictine oblate virgin assumed the name of "Maria della Trinità".

1784–1839 · Modern

Juliette Kim (Korean: 김 율리에타) was a Korean Christian laywoman, martyr, and saint, born in 1784 near Seoul, Korea, and beheaded on September 26, 1839, near Seoul.

1885–1970 · Contemporary

Iuliu Hossu (30 January 1885 – 28 May 1970) was a Romanian Greek-Catholic prelate who served as the Bishop of Cluj-Gherla. Pope Paul VI elevated Hossu to the rank of cardinal in pectore, that is, secretly, in 1969 but did not publish his appointment until after Hossu's death.

1896–1928 · Contemporary

Ivan Merz (16 December 1896 − 10 May 1928) was a Catholic layman from Bosnia and important supporter of the Catholic Church in Croatia. Merz promoted the Liturgical Movement in Croatia and together with Ivo Protulipac, he established a movement for the young people, Hrvatski orlo…

1914–1943 · Contemporary

Ivan Salmič was a Catholic priest born in Raka in 1914 and died in Vinica in 1943. A citizen of Cisleithania, the Kingdom of Serbs, Croats and Slovenes, and the Kingdom of Yugoslavia, he is currently recognized as a Servant of God by the Catholic Church.

1896–1973 · Contemporary

Ivan Slezyuk (Ukrainian: Іван Слезюк, Polish: Iwan Słeziuk; 14 January 1896 – 2 December 1973) was a Ukrainian Greek Catholic bishop and hieromartyr.

1899–1952 · Contemporary · Congregation of the Most Holy Redeemer

Ivan Ziatyk CSsR (Ukrainian: Іван Зятик, pronounced [iˈwɑn ˈzʲɑtɪk]; December 26, 1899 – May 17, 1952) was a Ukrainian Catholic priest, Redemptorist, and lecturer, considered to be a martyr by the Catholic Church.

1915–1942 · Contemporary

Ivanka Škrabec Novak (17 March 1915 – 4 June 1942) was a Slovenian teacher. She was martyred by Communists while six months pregnant because of her devout Catholic faith and opposition to Communism.

1040–1116 · Medieval

Ivo of Chartres, Can.Reg. (also Ives, Yves, or Yvo; Latin: Ivo Carnutensis; c. 1040 – 23 December 1115), was a French canon regular and abbot who then served as the Bishop of Chartres from 1090 until his death.

1253–1303 · Medieval · Third Order of Saint Francis

Ivo of Kermartin, TOSF (17 October 1253 – 19 May 1303), also known as Yvo, Yves, or Ives (and in Breton as Erwan, Iwan, Youenn or Eozenn, depending on the region, and known as Yves Hélory (also Helori or Heloury) in French), was a parish priest among the poor of Louannec, the onl…

501–700 · Medieval

Saint Ivo (also known as Ives) was a Cornish bishop and hermit, and became the eponymous saint of St Ives, Huntingdonshire. The discovery of Bishop Ivo's remains in 1001 was first mentioned briefly in John of Worcester's Chronicon ex chronicis.

1874–1930 · Contemporary · Society of Jesus

Jacint Alegre i Pujals was a Spanish Catholic priest, theologian, and member of the Society of Jesus who was born in Terrassa in 1874 and died in Barcelona in 1930. He has been declared Venerable by the Catholic Church.

1743–1773 · Modern · Dominican Order

Hyacinthe Castañeda, born Jacinto María Castañeda y Pujassons (Játiva, Kingdom of Spain, January 13, 1743 – Hanoi, Tonkin, November 7, 1773), was an 18th-century Spanish Dominican friar and Catholic missionary who died a martyr in Tonkin (modern-day Vietnam).