Where does “सामवेद” come from?

सामवेद (Sanskrit) comes from Sanskrit वेद, from Proto-Indo-European wóyde, from Proto-Indo-European weyd- — to see.

Ancestry of “सामवेद”, step by step

Step	Language	Word	Meaning
1	Sanskrit	वेद	knowledge, true or sacred knowledge or lore,...
2	Proto-Indo-European	wóyde	to have seen, to know
3	Proto-Indo-European	weyd-	to see

सामवेद — Etymology, Origin & Word History | Etymology Explorer