 A royal inspection of Saddell Abbey, dated to 1508, reveals that Ragnall styled himself in a Latin charter to the abbey rex insularum, dominus de Ergile et Kyntyre ("King of the Isles, Lord of Argyll and Kintyre"), a title which may indicate that Ragnall claimed all the possessions of his father. In what is probably a later charter, Ragnall is styled in Latin dominus de Inchegal ("Lord of the Isles") in his grant to the priory of Paisley. Although Ragnall's abandonment of the title "king" in favour of "lord" may not be significant, it could be connected with his defeat to Áengus, or to the expansion and rise in power of Ragnall's namesake and first cousin Rögnvaldr Guðrøðarson, King of the Isles (died 1229). The style dominus de Inchegal is not unlike dominus Insularum ("Lord of the Isles"), a title first adopted in 1336 by Ragnall's great-great-grandson, Eoin Mac Domhnaill, Lord of the Isles (died c. 1387), the first of four successive Lords of the Isles.
