An Etymological Dictionary of the German Language/Annotated/Hifthorn
Hifthorn, also Hüfthorn (a corruption due to the fact that the horn was carried attached to a belt around the waist — ‘Hüfte’), ‘hunting-horn,’ Modern High German simply; the earliest Modern High German form is Hiefhorn; Hief, also Hift, ‘the blast from a hunter’s horn.’ Allied to Gothic hiufan, Anglo-Saxon heófan, Old High German hiufan, ‘to wail, howl’?.