《元史·本纪·卷三》
当时有一个懂得天象，名叫黄答忽部的人说，宪宗以后一定会大贵，因此取名叫蒙哥。蒙哥，汉语是长生的意思。
时有黄忽答部知天象者，言帝后必大贵，故以蒙哥为名。
At that time, a person who understood the celestial phenomena named Huang Dahu said that Emperor Xianzong would surely become a noble in the future, so he was named Mengge. Mengge means everlasting in Chinese.