Where does “Atli” come from?

Atli (Old Norse) comes from Proto-Germanic *Attilô, from Proto-Germanic attô, from Proto-Indo-European átta — father.

Ancestry of “Atli”, step by step

StepLanguageWordMeaning
1Proto-Germanic*Attilô
2Proto-Germanicattôfather, dad; forefather
3Proto-Indo-Europeanáttafather
Every word from Proto-Indo-European áttaEvery word from Proto-Germanic attôEvery word from Proto-Germanic *Attilô