Claim: Helga Moddansdóttir's sibilings were Angus the Generous and sisters Frakkök and Þorleif, all four children having both Norse and Gaelic names as their father was Celtic and their mother was Norse.
Evidence: Whatever their origins, in addition to the titled Ótarr, Helga's siblings were, Angus "the Generous" and her sisters Frakkök and Þorleif. These children had both Norse and Gaelic names, whereas Orcadian families tended to have exclusively Norse names. It is thus likely that Helga's ancestors were of mixed heritage with her father being of Celtic origin and her mother possibly having a Norse background and related to the jarl Óttar who was killed in 1098 fighting in Man.