Where does “Quirico” come from?

Quirico (Italian) comes from Italian Ciriaco, from Ancient Greek Κυριακός, from Ancient Greek -ακός, from Ancient Greek -κός, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “Quirico”, step by step

Step	Language	Word	Meaning
1	Italian	Ciriaco	—
2	Ancient Greek	Κυριακός	of the Lord
3	Ancient Greek	-ακός	-ic
4	Ancient Greek	-κός	forms adjectives with the sense of 'of or...
5	Proto-Indo-European	-ḱos	-y, -ic

Every word from Proto-Indo-European -ḱos →Every word from Ancient Greek -κός →Every word from Ancient Greek -ακός →