Where does “Луперк” come from?

Луперк (Russian) comes from Latin Lupercus, from Latin arceo, from Proto-Italic arkeō, from Proto-Indo-European h₂erk- — to protect, guard, hold, lock.

Луперк (Russian): Lupercus Roman god

Definitions

Lupercus Roman god

Ancestry of “Луперк”, step by step

Step	Language	Word	Meaning
1	Latin	Lupercus	a priest of the god Lupercus
2	Latin	arceo	I shut up, enclose; box in; I keep off, ward off;...
3	Proto-Italic	arkeō	to contain
4	Proto-Indo-European	h₂erk-	to protect, guard, hold, lock

Every word from Proto-Indo-European h₂erk- →Every word from Proto-Italic arkeō →Every word from Latin arceo →