Where does “caaveyra” come from?

caaveyra (Old Portuguese) comes from Latin calavaria, from Latin calvāria, from Latin calva, from Latin -a, from Proto-Italic -ā, from Proto-Indo-European -éh₂.

Ancestry of “caaveyra”, step by step

Step	Language	Word	Meaning
1	Latin	calavaria	—
2	Latin	calvāria	a skull
3	Latin	calva	the bald scalp of the head; skull;...
4	Latin	-a	suffixed to the roots of verbs, forms agent...
5	Proto-Italic	-ā	Forms masculine agent nouns from prefixed or compounded bases
6	Proto-Indo-European	-éh₂	—

Words derived from “caaveyra”

caveira
caveirão

Every word from Proto-Indo-European -éh₂ →Every word from Latin -a →Every word from Latin calva →