天子

A son of Heaven. The Emperor-Princes, i. e. those who in previous incarnations have kept the middle and lower grades of the ten good qualities 十善 and, in consequence, are born here as princes. It is the title of one of the four mara, who is 天主 or lord of the sixth heaven of desire; he is also known as 天子魔 (天子業魔) and with his following opposes the Buddha-truth.