Halfdan (Old Norse: Halfdan, Old English: Healfdene, Medieval Latin: Haldānus, Proto-Norse: *Halbadaniz, "half Dane") was a late 5th and early 6th century legendary Danish king of the Scylding (Skjöldung) lineage, the son of king named Fróði in many accounts, noted mainly as the father to the two kings who succeeded him in the rule of Denmark, kings named Hroðgar and Halga in the Old English poem Beowulf and named Hróar and Helgi in Old Norse accounts.
His name would in his own language, Proto-Norse, have been *Halbadaniz (Danish on only one side of the family).
Read more about Halfdan: Various Accounts, The Children of Halfdan, Traditions of Harold, Fróði and Halfdan Possibly Related or Confused With The Above