Where does “Sven” come from?

Sven (Norwegian) comes from Norwegian Svein, from Old Norse Sveinn, from Old Norse sveinn, from Proto-Germanic swainaz, from Proto-Indo-European swé — self.

Ancestry of “Sven”, step by step

Step	Language	Word	Meaning
1	Norwegian	Svein	—
2	Old Norse	Sveinn	boy, lad
3	Old Norse	sveinn	boy, lad; servant, lackey
4	Proto-Germanic	swainaz	relative; kinsman; young man; herder; herdsman,...
5	Proto-Indo-European	swé	self

Every word from Proto-Indo-European swé →Every word from Proto-Germanic swainaz →Every word from Old Norse sveinn →