Óttar is an Scandinavian name. It stands for 'fearless warrior'.
In Heimskringla, Ottar is a Swedish king. The same king appears in Beowulf as Ohthere. See Ottar (king).
In Norse mythology, Óttar is the protégé of Freya, and the subject of the Lay of Hyndla.
The name Óttar Böllur appears in the Icelandic Saga Njála
The viking adventurer Ottar from Hålogaland