Where does “grzych” come from?

grzych (Silesian) comes from Polish grzech, from Polish Grzegorz, from Old Polish Grzegorz, from Latin Grēgorius, from Ancient Greek Γρηγόριος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

grzych (Silesian): sin

Definitions

Ancestry of “grzych”, step by step

Step	Language	Word	Meaning
1	Polish	grzech	sin
2	Polish	Grzegorz	—
3	Old Polish	Grzegorz	—
4	Latin	Grēgorius	—
5	Ancient Greek	Γρηγόριος	watchful, vigilant
6	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
7	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek Γρηγόριος →