How to name Cao's middle dry word?

It can be named: Cao Gansheng (Gan, which means one of the eight diagrams, stands for heaven. Sheng means bright and prosperous. )

Cao Ganhan (Han, meaning numerous and vast. )

Cao Gangan (Gang refers to bucket handle of the Big Dipper. Pass "just" )

Cao ganchun (chun, which means simple and honest. )

for reference.