Where does “κρανίον” come from?

κρανίον (Ancient Greek) comes from Ancient Greek κάρα, from Proto-Hellenic *kárahə.

κρανίον (Ancient Greek): skull; head

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	κάρα	head, face; the head or top of anything, as of a...
2	Proto-Hellenic	*kárahə	—

κρανίον — Etymology, Origin & Word History | Etymology Explorer