Where does “Amitabh” come from?

Amitabh is an English name derived from Sanskrit अमिताभ, which is composed of Sanskrit अमित meaning "immeasurable" or "boundless."

Ancestry of “Amitabh”, 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

Amitabh — Etymology, Origin & Word History | Etymology Explorer