Where does “Hannu” come from?

Hannu (Finnish) comes from Finnish Johannes, from Latin Iōhannēs, from Latin Iōannēs, from Ancient Greek Ἰωάννης, from Hebrew יוחנן, from Hebrew חנון, from Moroccan Arabic خنونة, from Arabic خُنَّة.

Hannu (Finnish): Hansel, the boy in the fairy tale Hansel and Gretel