Old Norse fjórði

← Old English fēorþa (cognate)

← Proto-Germanic *fedurþô (inherited)

← Old High German fiordo (cognate)

← Old Frisian fiārda (cognate)

← Old Saxon fiortho (cognate)

→ Old English feorþa (cognate)

→ Faroese fjórði (derived)

→ Westrobothnian fjöörn (inherited)

→ Old Swedish fiarþi (inherited)

→ Icelandic fjórði (derived)

→ Norwegian Bokmål fjerde (derived(nb/da))

→ Norwegian Bokmål fjerde (derived)

→ Norwegian Nynorsk fjerde (derived)

→ Old Frisian fiarda (cognate)

→ Swedish fjärde (inherited)