Ambrosius

Ambrosius or Ambrosios (a Latin adjective derived from the Ancient Greek word ἀμβρόσιος, ambrosios "divine, immortal") may refer to:

Given name:
 * Ambrosius Alexandrinus, a Latinization of the name of Ambrose of Alexandria (before 212–c. 250), Egyptian theologian and saint
 * Saint Ambrose (Aurelius Ambrosius) (c. 340–397), bishop of Milan
 * Ambrosius Aurelianus, fifth-century war leader of the Romano-British
 * Ambrosius of Georgia (1861–1927), Catholicos Patriarch of All Georgia
 * Ambrosius of Optino
 * Ambrosius, Metropolitan of Helsinki
 * Ambrosius, Metropolitan of Moscow
 * Ambrosius (Hussite), priest, leader of Hussite peasants
 * Ambrosius Beber (fl. 1610–1620), German composer
 * Ambrosius Benson (c. 1495/1500 – 1550), Italian painter
 * Ambrosius Blarer (1492–1564), Swiss reformer
 * Ambrosius Bosschaert (1573–1621), Dutch painter
 * Ambrosius Bosschaert II (1609–1645), Dutch painter, son of the above
 * Ambrosius Bogbinder, mayor of Copenhagen (1529–36)
 * Ambrosius Brueghel (1617–1675), Flemish Baroque painter
 * Ambrosius Ehinger (c. 1500 – 1533), German conquistador
 * Ambrosius Gudko (1867–1918), Russian Orthodox saint and bishop
 * Ambrosius Francken I (1544–1618), Flemish Baroque painter
 * Ambrosius Francken II (1590–1632), Flemish painter, nephew of the above
 * Ambrosius Frobenius (1537–1602), Swiss printer and publisher
 * Ambrosius Haingura (1957–2000), Namibian activist and politician
 * Ambrosius Holbein (c. 1494 – c. 1519), German and Swiss painter, drawer and printmaker, elder brother of Hans Holbein the Younger
 * Ambrosius Hubrecht (1853–1915), Dutch zoologist
 * Ambrosius Lobwasser (1515–1585), German humanist and translator
 * Macrobius (fl. 5th century), Roman grammarian and philosopher (Ambrosius Theodosius Macrobius in later manuscripts)
 * Ambrosius Moibanus (1494–1554), German Lutheran theologian and reformer
 * Ambrosius Pelargus (c. 1493 – 1561), German anti-reformer Dominican theologian
 * Ambrosius Petruzzy (died 1652), Italian sculptor
 * Ambrosios Pleianthidis, Greek Orthodox metropolitan bishop
 * Ambrosius Stub (1705–1758), Danish poet

Surname:
 * Johanna Ambrosius (1854–1939), German poet
 * Marsha Ambrosius (born 1977), English singer-songwriter

Fictional characters:
 * Merlin, in Arthurian legend, named Merlin Ambrosius in Godfrey of Monmouth's  Historia Regum Britanniae
 * Ambrosius, a character in the film Labyrinth