Rǫgnvaldr and Rhodri were also bound together by a marital alliance, as a papal letter, dated November 1199, indicates that a daughter of Rǫgnvaldr was betrothed to Rhodri. Although the precise date of the marriage is unknown, Rǫgnvaldr's military support of Rhodri in 1193 was almost certainly related to it. Rhodri died in 1195, and the same papal letter indicates that his widow was arranged to marry his nephew, Llywelyn ap Iorwerth, Prince of Gwynedd. The arrangement appears to have taken place in the context of Llywelyn's consolidation in Gwynedd. Like his uncle, Llywelyn appears to have intended to establish an alliance with the Islesmen in order strengthen his position in Wales. Although the arrangement may well evidence Rǫgnvaldr's power and influence in the region, Llywelyn clearly extricated himself from the arrangement in order to bind himself in marriage to a much stronger and more influential superpower, the English Crown. Although certain correspondence with the papacy reveals that the marriage between Llywelyn and Rǫgnvaldr's daughter had received papal approval in April 1203, another letter shows that the ratification was reversed on a technicality in February 1205. This ruling was clearly one of convenience for Llywelyn, as the latter was by this time married to Joan, an illegitimate daughter of John, King of England. This may have been about the time when Rǫgnvaldr himself first entered into what would be an enduring relationship with the English Crown.