Where does “רבא” come from?

רבא (Aramaic) comes from Proto-Semitic rabb- — to expand, to extend; lord, owner, chief;...

Ancestry of “רבא”, step by step

Step	Language	Word	Meaning
1	Proto-Semitic	rabb-	to expand, to extend; lord, owner, chief;...

רבא — Etymology, Origin & Word History | Etymology Explorer