Old English fyrn

← Proto-Germanic *firnijaz (inherited)

← Proto-Germanic *fernaz (mention)

← Old High German firni (cognate)

← Gothic 𐍆𐌰𐌹𐍂𐌽𐌴𐌹𐍃 (cognate)

← Proto-Indo-European *per- (derived)

← Old Norse forn (cognate)

→ English firn (cognate)

→ English forne (inherited)

→ Old English fyrnweorc (affix)

→ Old Norse fjǫrð (cognate)