慕容皝
Also in 339, Murong Huang married his sister to Tuoba Shiyijian, the Prince of Dai, cementing an alliance between the two Xianbei powers. (The two would, however, engage in occasional battles after Princess Murong's death in 342.) He also sent messengers to the Jin capital to formally request from Emperor Cheng the Prince of Yan title—explaining that he needed it to increase his authority over the people but that he was still loyal to Jin. In 341, after several months of debate, Emperor Cheng decided to grant Murong Huang the princely title.