Ruthenian (adj.)youdaoicibaDictYouDict[Ruthenian 词源字典]
1850, of or pertaining to the Ukrainian people (earlier Ruthene, 1540s), from Medieval Latin Rutheni "the Little Russians," a derivative of Russi (see Russia). For consonant change, compare Medieval Latin Prut(h)eni, from Prussi "Prussians." Another word in the same sense was Russniak.[Ruthenian etymology, Ruthenian origin, 英语词源]