An Etymological Dictionary of the German Language/Eppich
Eppich, m., ‘celery, parsley,’ with LG. consonants, from MidHG. ępfĭch, OHG. ępfī̆h, n., which are preceded by the shorter forms, MidHG. ępfe, ęffe, OHG. ępfi, n. This word, like other names of plants connected with horticulture and cookery, was borrowed previous to the OHG. period (see Kohl) from Lat.; the original word in this instance is apium, which denotes a species of umbelliferous plants, comprising parsley, celery, &c.; only in ModHG. has Eppich been confused in meaning with Epheu.