Where does “ага” come from?

ага (Russian) comes from Ottoman Turkish آغا, from Ottoman Turkish آقا, from Proto-Turkic āka, from Proto-Germanic *Ākā, from Latin aqua, from Proto-Italic akʷā, from Proto-Indo-European h₂ekʷeh₂ — water, flowing water.

ага (Russian): cane toad; ага́ • f anim; agha, master, patron

Definitions

cane toad; ага́ • f anim; agha, master, patron

Ancestry of “ага”, step by step

Step	Language	Word	Meaning
1	Ottoman Turkish	آغا	lord, master; eldest brother; eldest paternal...
2	Ottoman Turkish	آقا	Alternative spelling of آغا
3	Proto-Turkic	āka	elder
4	Proto-Germanic	*Ākā	—
5	Latin	aqua	water
6	Proto-Italic	akʷā	water
7	Proto-Indo-European	h₂ekʷeh₂	water, flowing water

Words derived from “ага”

Every word from Proto-Indo-European h₂ekʷeh₂ →Every word from Proto-Italic akʷā →Every word from Latin aqua →