Wang Shenzhi’s older brother Wang Chao was given the title of Surveillance Commissioner in 892. Wang Shenzhi himself was named military commissioner, and in 909, in the wake of the collapse of the Tang Dynasty two years earlier, named himself the Prince of Min. Wang Shenzhi’s son declared himself the Emperor of Min in 933. At that point, his father was posthumously named Min Taizu.
Etymology of "Min"
The early Chinese exonym Mǐn (閩) was a graphic pejorative written with Radical 142 虫, the "insect" or "reptile" radical. Xu Shen's (c. 121 CE) Shuowen Jiezi dictionary defines min as: "Southeastern Yue [i.e., Viet]; snake race. [The character is formed] from [the] insect / serpent [radical and takes its pronunciation from] mén.