Ἀρβουπάλης

From LSJ

οὐ τῷ πλήθει ἀλλὰ τῷ ἀξιώματι → not in numbers but in quality

Source

Spanish (DGE)

-ου, ὁ Arbupalas cuñado de Darío, Arr.An.1.16.3.

Greco-Persian Names

Ἀρβου + παλης (?); Justi, NB. 21, connects ἀρβου- with *arbu, akin to ἀλφός, and -παλης with a word akin to πῶλος, colt, Goth. fula, I.E. *fo(u); weisse Fallen besitzend; etymology doubtful.