 The only Óttar associated with Munster in the Irish sources is one Jarl Ottar or Ottir Iarla also known in Irish as Ottir Dub (Óttar the Black), who makes appearances in the famous "Cogad Gáedel re Gallaib".In that he is associated with the Viking settlement of Cork.It states that after the combined forces of him and Ragnall ua Ímair raided a number of places in Munster, they then split into three parties, one of which settled in Cork.