Where does “lampare” come from?

lampare (Ecclesiastical Latin) comes from Latin lampo, from Ancient Greek λάμπω, from Ancient Greek κτείς, from Proto-Indo-European *pḱtḗn, from Proto-Indo-European peḱ- — to pluck; livestock; wealth.

Ancestry of “lampare”, step by step

Step	Language	Word	Meaning
1	Latin	lampo	I shine
2	Ancient Greek	λάμπω	to shine, be bright, give light; to be loud,...
3	Ancient Greek	κτείς	comb; rake; horn of a lyre
4	Proto-Indo-European	*pḱtḗn	comb
5	Proto-Indo-European	peḱ-	to pluck; livestock; wealth

Every word from Proto-Indo-European peḱ- →Every word from Proto-Indo-European *pḱtḗn →Every word from Ancient Greek κτείς →