Halfdan ("half Dane") is an Old Norse masculine given name. In Beowulf it is spelled Healfdene, and in Latin sources Haldan. It may refer to: Mythical figures: Halfdan, legendary king of the Scyldings in Beowulf, who also appears in Norse mythology Halfdan the Old, ancient legendary king Halfdan Hvitbeinn, mythical petty king in Norway Halfdan the Valiant (7th century), legendary father of Ivar Vidfamne Hálfdan Brönufostri, subject of the legendary saga Hálfdanar saga Brönufóstra Halfdan Eysteinsson, subject of the legendary saga Hálfdanar saga Eysteinssonar People: Halfdan (floruit 782–807), Danish client of the Franks Halfdan the Black (c. 820-c. 860), father of Harald I of Norway Halfdan Ragnarsson (died 877), Viking, leader of the Great Heathen Army Halfdan Haraldsson the Black, Norwegian petty king and grandson of Halfdan the Black Halfdan, a joint King of Northumbria (reigned 902-910) - see Eowils and Halfdan Halfdan the Mild, son of King Eystein Halfdansson, of the House of Yngling Halfdan Bryn (1864–1933), Norwegian physician and physical anthropologist Halfdan Christensen (1873–1950), Norwegian stage actor and theatre director Halfdan Olaus Christophersen (1902–1980), Norwegian historian of ideas, non-fiction writer and World War II resistance member Halfdan E (born 1965), Danish film and television composer Halfdan Egedius (1877–1899), Norwegian painter and illustrator Halfdan Wexel Freihow (born 1959), Norwegian literary critic, novelist, editor and book publisher Halfdan Hegtun (1918–2012), Norwegian radio personality, comedian and writer, and politician Halfdan Holth (1880–1950), Norwegian veterinarian and professor Halfdan Jønsson (1891–1945), Norwegian trade unionist and World War II resistance member Halfdan Kjerulf (1815–1868), Norwegian composer Halfdan Lehmann (1825-1908), Norwegian government official Halfdan T. Mahler (1923-2016), Danish medical doctor and three-term director-general of the World Health Organization Halfdan Nielsen, Norwegian speedskater who set the world record in the 10,000 m in 1893 Halfdan Rasmussen (1915-2002), Danish poet Halfdan Strøm (1863–1949), Norwegian painter Halfdan Sundt (1873–1951), Norwegian physician and politician Old Norse personal names