sister to Mary de Ergadia

Clan: http://scotlandinoils.com/clan/Clan-MacDougall.html

She is: Wife of Rögnvaldr Olafsson — married [date unknown] [location unknown] Daughter of Ewen MacDougal (Argyll) MacDougall and [mother unknown] Sister of Juliana MacDougall, Malcolm MacDougall, Duncan MacDougall, Mary de Ergadia, and Alexander MacDonnchadh (Macdougall) Argyll

Sister in law of Magnus (Olafsson), the brother of Röngvaldr (Reginald / Ragnvald)