An Etymological Dictionary of the German Language/Aar

by Friedrich Kluge

Aar, m., from the equiv. MidHG. ar, OHG. aro, m., ‘eagle’; a prim. Teut. word, which has also cognates outside the Teut. group. Comp. Goth. ara, OIc. are, m., ‘eagle'; further OIc. ǫrn, OHG., MidHG. arn (to which is allied ModHG. Arnold, OHG. Aranolt, orig. sense ‘eagle-guardian'), AS. earn, ‘eagle,’ Du. arend, ‘eagle'; primarily cognate with OSlov. orĭlŭ, Lith. erélis, ‘eagle,’ Gr. ὄρνις, ‘bird,’ Corn. and Bret. er. W. eryr, ‘eagle.’ See Adler.