He is named in the Historia Brittonum, while a Finn, given a different father but perhaps intending the same hero, appears in Anglo-Saxon royal pedigrees.
A passage from Beowulf as translated by Seamus Heaney (lines 1089–1090) reads: A possible reference to a lost tradition on Finn appears in Snorri Sturluson's Skáldskaparmál.
The Danish berserkers who had helped him win the war demanded three pounds of gold each in pay, and two pieces of armour that nothing could pierce: the helmet battle-boar and the mailcoat Finn's heritage.
Finn, the son of Fodepald (i.e. Folcwald) is also mentioned in the pedigree list of Saxon ancestors of the legendary kings of Kent that appears in Historia Brittonum.
Richard North notes that Folcwalda is "identical with the first element of fólcvaldi goða ('ruler of the host of gods') which is an epithet reserved for Freyr".