An Etymological Dictionary of the German Language/Annotated/Uhr

by Friedrich Kluge

Uhr, feminine, ‘clock, watch, hour,’ Modern High German only, from Low German ûr, ‘clock, hour’ (even in the Middle High German period LRhen. ûr meant ‘hour’); corresponding to Dutch uur, English hour. Based on Latin hôra (compare French heure, Italian ora).