Where does “Vaid” come from?

Vaid (English) comes from Punjabi ਵੈਦ, from Sanskrit वैद्य, from Sanskrit वेद, from Proto-Indo-European wóyde, from Proto-Indo-European weyd- — to see.

Ancestry of “Vaid”, step by step

Step	Language	Word	Meaning
1	Punjabi	ਵੈਦ	doctor, physician
2	Sanskrit	वैद्य	doctor; physician
3	Sanskrit	वेद	knowledge, true or sacred knowledge or lore,...
4	Proto-Indo-European	wóyde	to have seen, to know
5	Proto-Indo-European	weyd-	to see

Every word from Proto-Indo-European weyd- →Every word from Proto-Indo-European wóyde →Every word from Sanskrit वेद →