Where does “Vaishampayan” come from?

Vaishampayan (English) comes from Hindi वैशंपायन, from Sanskrit वैशम्पायन.

Ancestry of “Vaishampayan”, step by step

Step	Language	Word	Meaning
1	Hindi	वैशंपायन	—
2	Sanskrit	वैशम्पायन	—

Vaishampayan — Etymology, Origin & Word History | Etymology Explorer