Raynald was the first among the witnesses to sign most royal charters between 1177 and 1180, showing that he was the king's most influential official during this period. Raynald became one of the principal supporters of Guy of Lusignan, who married the king's elder sister, Sybilla, in early 1180, although many barons of the realm had opposed the marriage. The king's half sister, Isabella (whose stepfather, Balian of Ibelin was Guy of Lusignan's opponent) was engaged to Raynald's stepson, Humphrey IV of Toron, in autumn 1180. BaldwinIV dispatched Raynald, along with Heraclius, Latin Patriarch of Jerusalem, to mediate a reconciliation between Bohemond III of Antioch and Patriarch Aimery in early 1181. Roupen III, Lord of Cilician Armenia, married Raynald's stepdaughter, Isabella of Toron.