A.S. fettan.

Fette, fetched, [1535].

Fetthed, fatness, abundance, [1547].

Fier, fire, [103], [464], [1140].

Fier-isles, fire ashes, [1130].

A.S. ysla, ashes.

Fieres, fire's, [1142], [3786].

Fif, five, [527], [746].

Fifte, fifth, [158], [159], [165], [166].

Fiftene, fifteen, [415], [417].