→
English firth (mention)
→
English fir (inherited)
→
English frith (mention)
→
Old English fyrhþ (derived)
→
Old English fyrhþ (derived)
→
Old English fyrhþe (mention)
→
Old English furh (derived)
→
Middle English firre (inherited)
→
Icelandic fura (inherited)
→
Old Norse fura (inherited)