From Wiktionary, the free dictionary
Askr
- (Norse mythology) Alternative form of Ask (“the first male human in the Edda”)
Inherited from Proto-Germanic *Askaz (“a son of Mannus”). Equivalent to askr (“ash tree”) as a proper noun.
Askr m (genitive Asks)
- (Norse mythology) Ask, the first male human according to the Poetic Edda