Where does “vankahko” come from?

vankahko (Finnish) comes from Finnish vankka, from Russian Ива́н, from Old East Slavic Иваннъ, from Ancient Greek Ἰωάννης, from Hebrew יוחנן, from Hebrew חנון, from Moroccan Arabic خنونة, from Arabic خُنَّة.

vankahko (Finnish): robustish, sturdish