Know your son's last name and double his name.

It can be: Xie Guikun, Xie Guitai, Xie Guiqian, Xie Guiyu, Xie Guilin, Xie Guiguan, Xie Guiheng, Xie Guiyi, Xie Guisheng, Xie Guige, Xie Guiding, Xie Guizhen and Xie Guifeng, using the names of hexagrams.

Xie Guiren, Xie Guiyi, Xie Guili, Xie Guizhi, Xie Guixin (benevolence, courtesy and wisdom), Xie Guiyuan, Xie Guiheng, Xie Guili, Xie Guizhen (Yuan Hengzhen is a 64-hexagram and four virtues), Xie Guiyu, Xie Guiman, Xie Guitang (happily ever after), Xie, Xie Guihua and Xie Guifu.