Where does “gend-” come from?

gend- (Proto-Balto-Slavic) comes from Proto-Indo-European gʷʰedʰ- — to request, pray, ask for.

Ancestry of “gend-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	gʷʰedʰ-	to request, pray, ask for

gend- — Etymology, Origin & Word History | Etymology Explorer