In 1169, King Amalric I of Jerusalem sent the archbishop of Tyre, Frederick de la Roche, on a mission to drum up martial and financial support for Jerusalem and get her daughter Sibylla a husband as her only brother Baldwin suffered from leprosy. Frederick convinced a well-connected nobleman by the name of Stephen I of Sancerre to come east and marry the princess. He accepted and travelled east with his counterpart Hugh III of Burgundy and money from Louis VII of France. It was anticipated that the man would become the future King of Jerusalem and was given a warm reception by the Haute Cour. For reasons unknown, he refused to marry Sibylla and went back home to France. First things is no marriage to William Longsword which means to no Baldwin V though it could mean her brother Baldwin IV would be passed over to Stephen. Slightly different politics when it comes to Jerusalem but nothing more I guess.