Halfdan (, , Medieval : "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. Various accounts According to the Chronicon Lethrense and Saxo Grammaticus' Gesta Danorum (Book 2), Halfdan had two brothers named Ro and Skat who also sought the throne. Both were killed by Halfdan. Saxo adds that his brothers' supporters were hanged and that Halfdan continued to reign with great cruelty, but that he reigned long and died peaceably in extreme old age. The Ynglinga saga gives Halfdan (in this work also son of a king named Fróði) a brother named Fridleif and says both were great warriors but that Halfdan was the better of the two. This might have been a lead-in to a feud between the brothers if Snorri had been dealing with Danish matters rather than Swedish matters. Snorri here only tells us that Halfdan attacked King Aun of Sweden and drove him into exile into Götaland. Halfdan then ruled Sweden for twenty years until he died in Uppsala of sickness and was buried in a mound. According to Ynglinga saga, a Danish king named Fróði the Bold aided Aun's successor Egil against the rebelling thrall Tunni. This may be Froda the Heathobard of Beowulf who becomes Fróði the slayer of Halfdan in other Norse traditions which do not make his end peaceful. In the Saga of Hrolf Kraki, this Fróði is Halfdan's younger brother but in the Latin epitome to the Skjöldunga saga the younger brother, here a half-brother, is named Ingjalldus and this Ingjalldus is later father of a son named Frothi. Since in Beowulf Froda is father of a son named Ingeld, it is usually considered that the names have accidentally been interchanged in the tradition behind the Skjöldunga saga. In the Saga of Hrolf Kraki, Fróði brother of Halfdan is ruler of a separate kingdom. Halfdan was calm and good-natured but Fróði was cruel and vicious. Fróði attacked Halfdan's hall by night and burned it. Halfdan was killed in the battle and Fróði took over his country and his widow. But eventually Halfdan's sons in turn