An Etymological Dictionary of the German Language/hüpfen
hüpfen, vb., from the equiv. MidHG. hüpfen, hupfen, ‘to hop’; OHG. *hupfen is by chance not recorded; so too AS. *hyppan, whence MidE. hyppen. E. to hip. Akin also to ModHG. and MidHG. hopfen, AS. hoppian, E. to hop, OIc. hoppa; Goth. *hupôn, *huppjan, are wanting. UpG. dialects besides hoppen, from OHG. *hoppôn (OTeut. *hubbôn). AS. hoppettan, ‘to hop,’ MidHG. *hopfzen, ModHG. hopsen, are differently formed.