Where does “অমিতাভ” come from?

অমিতাভ (Bengali) comes from Sanskrit अमिताभ, from Sanskrit अमित, from Sanskrit अ-, from Proto-Indo-Iranian a-, from Proto-Indo-European n̥-, from Proto-Indo-European ne — not.

Ancestry of “অমিতাভ”, step by step

Step	Language	Word	Meaning
1	Sanskrit	अमिताभ	Immeasurable Light
2	Sanskrit	अमित	unmeasured, boundless, infinite
3	Sanskrit	अ-	un-, not; Used in the formation of imperfect,...
4	Proto-Indo-Iranian	a-	un-, a-
5	Proto-Indo-European	n̥-	not, un-
6	Proto-Indo-European	ne	not

Every word from Proto-Indo-European ne →Every word from Sanskrit अ- →Every word from Proto-Indo-European n̥- →