An Etymological Dictionary of the German Language/Schuppen
Schuppen, Schoppen, m., ‘shed, coach-house,’ ModHG. only, formed from MidG. and LG.; corresponding to AS. sčypen. E. dial. shippen, ‘stable’; in OHG. and MidHG. schopf, schof (Bav. and Alem. Schopf), ‘structure without walls, penthouse, vestibule.’ Comp. AS. sčęoppa, ‘hull, hut,’ E. shop (from AS. is also probably derived Fr. échoppe, ‘booth’).