Where does “pedwar” come from?

pedwar (Middle Welsh) comes from Old Welsh petuar, from Proto-Brythonic pedwar, from Proto-Celtic *kʷetwores, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

Ancestry of “pedwar”, step by step

Step	Language	Word	Meaning
1	Old Welsh	petuar	—
2	Proto-Brythonic	pedwar	four
3	Proto-Celtic	*kʷetwores	—
4	Proto-Indo-European	kʷetwóres	four
5	Proto-Indo-European	kʷe-	and

Every word from Proto-Indo-European kʷe- →

pedwar — Etymology, Origin & Word History | Etymology Explorer