Fífta fæder

Selon le Dictionnaire Anglo-Saxon :

fífta fæder

m. The fifth father; ătăvus :-- Felix, se pápa wæs his [Gregories] fífta fæder Felix, the pope was his [Gregory's] fifth father, that is -- reckoning Gregory's father as the first generation, his fifth father would be his great-grandfather's grandfather, Homl. Th. ii. 118, 9. fifta fæder