Old Norse fimmtán

← Old English fīftīene (cognate)

← Proto-Germanic *fimftehun (inherited)

← Old High German fimfzehan (cognate)

← Gothic 𐍆𐌹𐌼𐍆𐍄𐌰𐌹𐌷𐌿𐌽 (cognate)

← Old Frisian fīftīne (cognate)

← Old Saxon fīftein (cognate)

→ Old English fiftiene (cognate)

→ Danish femten (derived)

→ Faroese fimtan (derived)

→ Westrobothnian femtan (inherited)

→ Old Danish fæmtan (derived)

→ Old Danish fæmtæn (inherited)

→ Old Swedish fæmtan (derived)

→ Icelandic fimmtán (derived)

→ Norwegian Bokmål femten (derived)

→ Norwegian Nynorsk femten (derived)

→ Old Saxon fiftein (cognate)

→ Elfdalian femtǫ (inherited)

→ Swedish femton (inherited)