We seem to have a duplication of this guy:
https://www.geni.com/people/Hrollaug-Eyjafjörður-Íslands/6000000001...
Both MP. According to the profiles, one took land in France, the other in Iceland.
Snorre plainly says that Ragnvald had 6 sons - 3 by "frille" and 3 by the daughter of Rolf Nesja. There's no room for another Rollaugh in that chart.
The question is as usual: To merge or not to merge?
If that's supposed to be Rollo of Normandy, there are unresolved questions about his ancestry - descent from Rognvald is "traditional", but an older tradition gave his father's name as "Ketil" and there's no good reason to think that either one is historically accurate. http://fmg.ac/Projects/MedLands/NORMANDY.htm#_Toc479325753
An attempt to sort things out via Y-DNA research was foiled when it was discovered that someone had been playing shell-and-pea with ancestral remains and nobody was where they were supposed to be.
The one Pam PM'd seemed to be linked to the French Rollo tradition, while the other one was strictly linked to the Snorre tradition. That made me wonder - I hadn't seen documentation of a Hrollaug linked to France before.
We might want to unlink the "French" one from Ragnvald, and just leave his relationship to Rollo as a note in the profile.