What primary Sources make Ragnhild Roric a daughter of Ragnall mac Somhairle, Lord of the Isles?
Cawley doesn't have her: http://fmg.ac/Projects/MedLands/SCOTTISH%20NOBILITY.htm#Reginaldson...
Anne Brannen I'm locking relationships in this area - so am disconnecting this profile. Please put it back if it is legitimate line. I can't find sources as far down as I went - so I'm suspecting it's bogus - but you mat have more info on this that I don't.
There is a useful source note on her WikiTree page which explains a possible source for her; the upshot is that there is no evidence.
https://www.wikitree.com/wiki/Isle-3