What does "马亲王" mean?

大陆作家马伯庸，兼职微博段子手，深受网民喜爱。屡遇劫难而毫发无伤，人称“祥瑞亲王”，简称亲王。

ENMainland writer Ma Boyong, also a part-time Weibo comedian, is deeply loved by netizens. He has repeatedly encountered disasters but has been unharmed, and is known as the 'Auspicious Prince,' or 'Prince' for short.