Dictionary of Medieval Names
from European Sources

Halfdan m. Proto-Germanic *halbaz 'half' + Proto-Germanic *daniz 'Dane, man from Denmark'.

The name of a 5th-6th C legendary king of Denmark, a legendary king appearing in Scandinavian legends, a mythical petty king in Norway, a 9th C king of Vestfold, a 9th C commander of the Viking army that invaded England, and a 10th C joint king of Northumbria.

Sweden
Old Swedish
1383 Halden SRA-vol2 no. 1903; 1409 Haldan (nom) SDHK no. 17268, Halden (nom) ibid. no. 17226, Haldhan (nom) ibid. no. 17256
Cite as: S.L. Uckelman. "Halfdan". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Halfdan.