Πάρθος
From LSJ
τί ἦ μοι ταῦτα περὶ δρῦν ἢ περὶ πέτρην → but what is this to me, about an oak or a rock | but what are these things about a tree or a rock to me | why all this about trees and rocks | why all this about what we have nothing to do with | but why am I off on this tangent
English (Strong)
probably of foreign origin; a Parthian, i.e. inhabitant of Parthia: Parthian.
English (Thayer)
Παρθου, ὁ, a Parthian, an inhabitant of Parthia, a district of Asia, bounded on the north by Hyrcania, on the east by Ariana, on the south by Carmania Deserta, on the west by Media; plural in B. D. under the word Smith's Bible Dictionary, Parthians; Geo. Rawlinson, Sixth Great Oriental Monarchy, etc. (Lond. 1873).)
Russian (Dvoretsky)
Πάρθος: ὁ парфянин Her., Aesch., etc.