Type Word & Element Usage Old Norse Meaning & History Old Norse word meaning "wave". Related ItemsDetails Other Languages & Culturesunþī(Old Germanic) Given Name DescendantsSteinunn, Þórunn, Unnur(Icelandic) Reidun, Torunn, Unn, Unni(Norwegian) Hreiðunn, Steinunn, Þórunn, Unnr(Old Norse)