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1902–1975 · Contemporary

Saint Dimitrios Gagastathis (August 1, 1902 – January 29, 1975) was a 20th-century Greek clergyman and father of nine children, who was canonized by the Orthodox Church in 2025 and is commemorated on January 29, the day of his repose.

1651–1709 · Modern

Demetrius of Rostov (Russian: Димитрий Ростовский, romanized: Dimitry Rostovsky, Ukrainian: Димитрій Ростовський, romanized: Dymytrii Rostovskyi, secular name Daniil Savvich Tuptalo, Russian: Даниил Саввич Туптало, or Tuptalenko, Russian: Тупталенко, according to some sources; 11…

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Dingad or Dingat ap Brychan was a late 5th century Welsh saint and early Christian church founder. He is recorded in all the early 'Brychan documents' as a son of King Brychan, King of the Welsh kingdom of Brycheiniog in south-east Wales.

330–394 · Early Church

Diodore of Tarsus (Greek Διόδωρος ὁ Ταρσεύς; died c. 390) was a Christian bishop, monastic reformer, and theologian. A strong supporter of the orthodoxy of Nicaea, Diodore played a pivotal role in the Council of Constantinople and opposed the anti-Christian policies of Julian the…

350 · Early Church

Saint Diogène was born in 350 and served as a bishop. He was a prelate who died in Arras.

300–400 · Early Church

Saint Diomedes of Tarsus (Ancient Greek: Διομήδης ὁ Ταρσεύς, romanized: Diomḗdēs ho Tarseús; also known as Diomede; died between 298 and 311 AD) is venerated as a Greek Christian saint and martyr, being one of the Holy Unmercenaries. Diomedes was born in Tarsus.

400 · Early Church

Saint Diomedes the Younger was born in Cyprus. He died in 400.

234 · Early Church

Dionisia is a genus of parasitic alveolates belonging to the phylum Apicomplexa. The type species of this genus is Dionisia bunoi. The genus was described by Landau et al. in 1980.

1500–1545 · Reformation

The Monastery of Agios Dionysios in Olympus (Greek: Μονή Αγίου Διονυσίου εν Ολύμπω) is a Greek Orthodox monastery on the slopes of Mount Olympus, the most important monastery in the Pieria Prefecture. It is located at the Enipeas ravine at an altitude of 850 m .

1547–1622 · Reformation

Saint Dionysios of Zakynthos was a 16th-century Orthodox Christian Bishop of Aegina. He was born on the Greek island of Zakynthos in 1547. He is the patron saint of Zakynthos (sometimes called Zante in English) and is celebrated on August 24 and December 17.

200–268 · Early Church

Pope Dionysius (Greek: Διονύσιος) was the bishop of Rome from 22 July 259 AD to his death on 26 December 268. His task was to reorganise the Catholic Church, after the persecutions of Emperor Valerian I, and the edict of toleration by his successor Gallienus.

475–544 · Medieval

Dionysius Exiguus (Latin for "Dionysius the Humble"; Greek: Διονύσιος; c. 470 – c. 544) was a 6th-century Eastern Roman monk born in Scythia Minor.

1420–1492 · Medieval

Dionysius I of Constantinople (Greek: Διονύσιος; died 1492) was Ecumenical Patriarch of Constantinople two times, from 1466 to 1471 and from 1488 to 1490. He is honoured as a saint in the Eastern Orthodox Church and his feast day is 23 November.

1300–1385 · Medieval

Saint Dionysius I (Russian: Дионисий, romanized: Dionisy; secular name: David; c. 1300 – 15 October 1385) was the metropolitan of the Russian Orthodox Church from 1384 to 1385.

250–306 · Early Church

Dionysius of Augsburg (died c. 306), whose life dates and biography are almost entirely unknown, is a saint and martyr of the Roman Catholic Church who is said to have been the first bishop of Augsburg. All accounts are based on traditions and historical fragments.

150–171 · Early Church

Dionysius of Corinth, (Greek: Διονύσιος ό Κορίνθιος) also known as Saint Dionysius, was the bishop of Corinth circa AD 171. His feast day is commemorated on April 8. The date is established by the fact that he wrote to Pope Soter.

200–193 · Early Church

Dionysius was Bishop of Vienne. He was among the ten missionaries sent by Pope St. Sixtus I with St. Peregrinus to Gaul. Dionysius later succeeded St. Justus as Bishop of Vienne, in Dauphiné, France.

100–100 · Early Church

Dionysius the Areopagite was an Athenian judge at the Areopagus Court in Athens, who lived in the first century. A convert to Christianity, he is venerated as a saint by multiple denominations.

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Dioscorides of Smyrna (died c. 250 in Myra, Lycia, in modern-day Turkey) was a Christian who was martyred during the persecutions of the Roman Empire. He has been venerated since ancient times by the Catholic Church and the Orthodox Church as a saint and martyr.

250–305 · Early Church

Dioscorus I (Greek: Διόσκορος Α΄ ὁ Ἀλεξανδρείας), also known as Dioscorus the Great, was the pope of Alexandria and patriarch of the See of St. Mark who was deposed by the Council of Chalcedon in 451. He was recognized as patriarch by the Coptic Church until his death.

1862–1915 · Contemporary

Diran Kelekian (Dikran Kelegian, Armenian: Տիրան Քէլէկեան, 1862–1915) was an Ottoman Armenian journalist and professor at the Darülfünûn-u Şahâne (now the University of Istanbul). He was editor of two newspapers, Cihan (since 1883) and Sabah (since 1908).

550–583 · Medieval

Saint Disciola was the niece of Saint Salvius, Bishop of Albi. She entered the Abbey of the Holy Cross, founded by Queen Radegund and then led by its first abbess, Saint Agnes of Poitiers, at a very young age.

619–700 · Medieval

Saint Disibod (619–c. 674) was an Irish monk and hermit, first mentioned in a martyrologium by Hrabanus Maurus (9th century). Hildegard of Bingen around 1170 composed a Vita of Saint Disibod. He is commemorated on 8 September.

600–658 · Medieval

Diuma (or Dwyna or Duma) was the first Bishop of Mercia in the Anglo-Saxon Kingdom of Mercia, during the Early Middle Ages. All that is known of Diuma's life is contained in a short account in Bede's Ecclesiastical History of the English People.

1201 · Medieval

Dmitar Nemanjić (Serbian Cyrillic: Дмитар Немањић, d. after 1286), also known as Dimitrije Nemanjić (Serbian Cyrillic: Димитрије Немањић), was a Serbian prince, from the Nemanjić dynasty.

1350–1389 · Medieval

Dmitry Ivanovich Donskoy (Russian: Дми́трий Ива́нович Донско́й; 12 October 1350 – 19 May 1389) was Prince of Moscow from 1359 and Grand Prince of Vladimir from 1363 until his death. He was the heir of Ivan II.

1871–1937 · Contemporary

Dmitry Lebedev was an Eastern Orthodox theologian and protoiereus who lived from 1871 to 1937. He is recognized as a hieromartyr.

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Dmitry Vasilyevich, nicknamed Menshoy, was a canonized appanage Prince of Zaozerye who lived between 1380 and 1440. Primary information about Dmitry Vasilyevich is preserved in the Typografskaya and Yermolinskaya chronicles, as well as in the hagiographies of Saints Dionysius of…

1582–1591 · Reformation

Dmitry Ivanovich (Russian: Дмитрий Иванович; 29 October [O.S. 19 October] 1582 – 15 May 1591) was the youngest son of Russian tsar Ivan the Terrible.

1275–1296 · Medieval

Sant Dnyaneshwar (Marathi pronunciation: [d̪ɲaːn̪eʃʋəɾ]), (Devanagari : सन्त ज्ञानेश्वर), pronunciation also referred to as Jñāneśvara, Jñānadeva, Dnyandev or Mauli or Dnyandev Vitthal Kulkarni (1275–1296 (living samadhi)), was a 13th-century Indian Marathi saint, poet, philosoph…

1487–1554 · Reformation

Milica Despina (Serbian Cyrillic: Милица Деспина; Romanian: Milița Despina; c. 1485 – 30 January 1554) was the Princess consort of Wallachia by marriage to Neagoe Basarab (r. 1512–1521).

1661–1729 · Modern

Doamna Marica Brâncoveanu (circa 1661 – 1729) was a princess consort of Wallachia by marriage to Constantin Brancoveanu (r. 1688–1714). Her father was Neagu, son of the Wallachian prince Antonie of Popești (r.1669-72) and Necșuța. She married Constantin Brancoveanu in 1674.

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Doda was a French aristocrat, the daughter of Arnoald, and the spouse of Arnulf. She died in Trier and is venerated as a Catholic saint.

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Saint Dode (born before 509) was an Abbess of Saint Pierre de Reims and a French Saint whose Feast Day is 24 April. She is reputed to be the daughter of Chloderic, King of the Ripuarian Franks and the sister of Munderic, making her a princess of the Ripuarian Franks.

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682–760 · Medieval

Dodon de Wallers was born in 682 in Vaulx and lived as a hermit. He died in 760 and is recognized as a saint.

596 · Medieval

Dodo of Gareja (Georgia, 6th century – Gareja, Georgia, 596) was a Georgian prince and a monk at the David Gareja Monastery. He is venerated as a saint by the Orthodox Church and the Georgian and Syriac churches.

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Dofgan (5th century), or Doewan, is a Christian saint from Dyfed, a descendant of a local petty king, who was martyred in the 5th century at the hands of pagans in Wales. He is celebrated locally on July 13.

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Saint Doged was a king around the years 540–542, and he is said to have founded Llanddoged in the Conwy Valley. He is said to have been the son of Cedig ap Ceredig ap Cunedda Wledig and a king who succeeded his father in either Rhufoniog or Rhos during the 6th century.

470 · Early Church

Saint Dogmael (or Docmael, Dogfael, Dogmeel, Dogwel, Toel) was a 6th-century Welsh monk and preacher who is considered a saint. His feast day is 14 June.

500 · Medieval

Dogfan, also known as Doewan, was a saint and martyr who lived in 5th century Wales. He is venerated in the Anglican Church, Eastern Orthodox Church, True Orthodox Church, and Roman Catholic Church, on 13 July. He is the patron saint of Llanrhaeadr-ym-Mochnant in Wales.

500 · Medieval

Saint Domangart was the son of Eochaid mac Muiredaig Muinderg. He died in 500 and is recognized as a Catholic saint.

1775–1839 · Modern · Dominican Order

Dominic Tuoc (Vietnamese: Đa Minh Tước) (Trung Lao, 1775 – Nam Dinh, April 2, 1839) was a Vietnamese priest. Beatified in 1900, he was proclaimed a saint by Pope John Paul II in 1988.

1924–1975 · Contemporary

Dometie Manolache (October 15, 1924, Bălănești, Romania – July 6, 1975, Râmeț, Romania) was a Romanian Orthodox monk with the rank of archimandrite, canonized as a saint by the Holy Synod of the Romanian Orthodox Church during its session on July 11–12, 2024, under the title Sain…

363 · Early Church

Saint Dometius (Domitius) the Persian (died 363) is venerated as a Christian martyr and saint. According to tradition, he was martyred by lapidation during the reign of Julian the Apostate with two companions. He was killed at Nisibis in Mesopotamia.

775 · Medieval

Saint Domice d'Amiens died in 775 in Fouencamps. He is recognized as a saint.

1589–1633 · Reformation · Dominican Order

Domingo Ibáñez de Erquicia (c. 1589 – August 14, 1633) was a Spanish Dominican priest and missionary. After teaching at the Colegio de Santo Tomas in Manila, he went to Japan in 1623, where he ministered incognito to the Catholic community for about ten years.

1243–1250 · Medieval

Dominguito del Val (c. 1243 – c. 1250) was a legendary child in medieval Spain, allegedly a choirboy ritually murdered by Jews in Zaragoza (Saragossa).

1801–1839 · Modern · Third Order of Saint Dominic

Saint Dominic Bùi Văn Úy (born 1801 or 1812 in Tiên Môn, Thái Bình province, Vietnam; died December 19, 1839, in Cổ Mễ, Bắc Ninh province, Vietnam) was a catechist, a Dominican tertiary, a martyr, and a saint of the Catholic Church.

1817–1862 · Modern

Saint Dominic Huyện (Vietnamese: Đaminh Huyện) (born c. 1817 in Đông Thành, Thái Bình province, Vietnam; died June 5, 1862, in Nam Định) was a martyr and a saint of the Catholic Church. Dominic Huyện was born in Đông Thành, Thái Bình province.