Where does “Vasudeva” come from?

Vasudeva is from Sanskrit वसुदेव, a proper name of uncertain ultimate origin and meaning.

Ancestry of “Vasudeva”, step by step

Step	Language	Word	Meaning
1	Sanskrit	वसुदेव	—
2	Sanskrit	देव	heavenly, divine, also said of terrestrial things...
3	Proto-Indo-Iranian	daywás	god
4	Proto-Indo-European	deywós	god
5	Proto-Indo-European	dyew-	to be bright; sky, heaven

Vasudeva — Etymology, Origin & Word History | Etymology Explorer