Proto-Germanic *fernaz

→ English firn (mention)

→ English forne (mention)

→ Old English fyrn (mention)

→ German firn (inherited)

→ Old Swedish forn (inherited)

→ Gothic 𐍆𐌰𐌹𐍂𐌽𐍃 (inherited)

→ Alemannic German Fiire (inherited)

→ Icelandic forn (inherited)

→ Old Norse forn (inherited)

→ Swedish forn (inherited)