Topp : 1: English: nickname perhaps from Middle English top(pe) tope Old English topp(a) ‘hair on the head; tuft of hair’ for someone with distinctive hair. Compare Topping. Alternatively from Middle English top(pe) tope Anglo-Norman French toup side-forms of Middle English tup(pe) ‘ram male sheep’. A third possibility is a relationship name from the Middle English personal name Top(pe) Tope perhaps representing an unrecorded Old English Top(p) or Toppa of uncertain origin or else (especially in east and northern England) Old Norse Tōpi Tupe; see Toop.2: German: from Low German topp ‘point tree top’ hence a topographic name from the location of the dwelling; alternatively a metonymic occupational name or nickname from the same word in the sense ‘braid’.3: German: variant of Dopp.4: Jewish (Ashkenazic): variant of Top.

Source : DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press
FANBI : The Oxford Dictionary if Family Names in Britain and Ireland, ©2016, University of the West of England

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