Where does “jaka” come from?

jaka (Polish) comes from German jacke, from Middle French jaque, from Middle French jacques, from French jacques, from Latin Iacobus, from Ancient Greek Ἰάκωβος, from Ancient Greek Ἰακώβ, from Hebrew יַעֲקֹב — heel of the foot; heel.

jaka (Polish): feminine nominative/vocative singular of jaki