Where does “*pompe” come from?

*pompe (Oscan) comes from Proto-Italic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

Ancestry of “*pompe”, step by step

Step	Language	Word	Meaning
1	Proto-Italic	kʷenkʷe	five
2	Proto-Indo-European	pénkʷe	five

*pompe — Etymology, Origin & Word History | Etymology Explorer