An Etymological Dictionary of the German Language/Pfanne
Pfanne, f., from the equiv. MidHG. pfanne, OHG. pfanna, f., ‘pan’; widely diffused in Teut. with the same sense, Du. pan, AS. pǫnne, f., E. pan. The permutation of p to HG. pf indicates the early existence of the word in the form panna in G., perhaps about the 7th cent., or, on account of the coincidence of the E. with the MidEur. Ger. word, far earlier. The Lat. form of patina, ‘dish, pan,’ is scarcely adequate to serve as the immediate source of the Teut. words; comp. further Pfennig. From Teut. is derived the equiv. Slav. pany.