Old English oþþe

← Old English ofþe (mention)

← Old English eþþa (cognate)

← English if (mention)

← Proto-Germanic *efþau (derived)

← Old High German odo (cognate)

← Old Norse eða (cognate)

← Old Frisian jeftha (cognate)

← Old Frisian joftha (mention)

← Old Saxon eftha (cognate)

→ English or (inherited)

→ German oder (mention)

→ Icelandic eða (mention)

→ Old Norse eðr (mention)

→ Old Saxon eftha (cognate)