Olof the Black var även gift med Christina, dotter till Ferguard, jarl av Ross, Skottland, hon var hans tredje hustru. (Fra Skanke-slektens historie, G.V.C. Young, 1986)
Know you not that you lived long with the cousin of her whom you now have as your wife ? Olave did not deny the truth of what had been said, and acknowledged that he had long kept her cousin as a concubine. A synod therefore was assembled, and in it bishop Reginald canonically separated Olave the son of Godred and Lauon his wife. Afterwards, Olave married Christina, daughter of Fenquhard, Earl of Ross. (Chronicle of Man and the Sudreys)
Det ble i fjor (2003) gitt ut et praktverk om Nidaros domkirke i anledning 850-års jubileet: Ecclesia Nidrosiensis 1153-1537: Søkelys på Nidaroskirkens og Nidarosprovinsens historie. I denne boken er det et kapittel om The Diocese of the Sudreyar skrevet av Alex Woolf. Kapitlet er skrevet på engelsk. Her nevnes bl.a. biskop Ragnvald (Rognvald), sønnesønn av kong Gudrød (Godred). Denne biskopen gjorde seg kjent ved at han annulerte ekteskapet til Olaf the Black, King Rognvald's brother.
Woolf skriver: The grounds for this annulment were that Olaf had previously kept a first cousin of his wife as a concubine and was therefore, technically, committing incest. This seems an extremely nice distinction for mediaval Gaeldom, and the requel to this story probably explains the real motive. On being released from his first marriage to Lauon, a daughter of a nobleman in Kintyre, Olaf married Christina the daughter of Ferchar earl of Ross. Lauon's father is nowhere named in our sources, but it is likely that he was Ruaídrí son of Rognvald son of Somerled who ruled Kintyre in the early thirteenth century. Ruaídrí appears to have lost his lands, and perhaps his life, in the course of the Scottish king Alexander II's expeditions to the west in 1221 and/or 1222. Following its account of Olaf's marriage to Christina, the Chronicle tells us that Laon's sister, queen to king Rognvald, provoked Rognvald's son Godred into attacking his uncle Olaf. Despite initial discomfiture, Olaf, with the helf of earl Ferchar, overcame his nephew. This incident is dated to the year 1223. The dating would suggest that it was the collapse of Ruaídrí's position in Kintyre that led Olaf, now based in the North, to seek a more appropriate ally in Ferchar. If this interpretation of events is correct then we should see bishop Rognvald as the tool of Olaf's policy rather than as an officious reformer. It would be interesting to know whether the Mac Ruaídrís owed their later position of strength in Garmoran and the Long Island to Olaf's patronage.
Her får vi interessante antydninger om slektstilhørighet for Lauon og hennes søster som føres tilbake til Somerled. Han var gift med Ragnhild datter av Olav Gudrødson og Ingebjørg. Ingebjørg var igjen datter of Håkon, jarl på Orknøyene. (May Teistevoll, Norge) och (Fra Skanke-slektens historie, G.V.C. Young, 1986)