1545-55; earlier also hord, horda ≪ Czech,Polishhorda < Ukrainian dialectgordá,Ukrainianordá,Old Russian (orig. in Zolotaya orda the Golden Horde), via Mongolian or directly < Turkicordu, orda royal residence or camp (later, any military encampment, army); cf. Urdu
1550s, from W. Turkic (cf. Tatar urda "horde," Turkish ordu "camp, army"), to English via Polish, French, or Spanish. The initial -h- seems to have been acquired in Polish. Transferred sense of "uncivilized gang" is from 1610s. Related: Hordes.