Feówerþa-fæderBosworth & Toller 盎格鲁-撒克逊古英语词典 - feówerþa-fæder根据古英语词典：MS. feówerþe-fæderfeówerþa-fæder; indecl. in sing. A great-great-grandfather; ăbăvus, Ælfc. Gl. 91; Som. 75, 12; Wrt. Voc. 51, 57. feowerþa-fæder