Where does “quatro” come from?

quatro (Venetian) comes from Latin quattuor, from Latin caput, from Proto-Italic kaput, from Proto-Indo-European káput, from Proto-Indo-European kap- — to seize, hold.

quatro (Venetian): four

Definitions

four

Ancestry of “quatro”, step by step

Step	Language	Word	Meaning
1	Latin	quattuor	four; 4
2	Latin	caput	head; headlike protuberance on an organ or body...
3	Proto-Italic	kaput	head
4	Proto-Indo-European	káput	head
5	Proto-Indo-European	kap-	to seize, hold

Every word from Proto-Indo-European kap- →Every word from Proto-Indo-European káput →Every word from Proto-Italic kaput →