An Etymological Dictionary of the German Language/Wiedehopf
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Wiedehopf, m., ‘hoopoe’ (bird), from the equiv. MidHG. witehopfe, m., OHG. wituhopfo (-hoffo), m., lit. ‘forest hopper.’ OHG. witu, ‘timber,’ equiv. to AS. wudu, E. wood (comp. Kramtsvogel), is primit. allied to OIr. fid, ‘tree’ (or Gr. φιτρός, ‘block of wood, log’). Comp. hüpfen.