Originally Posted by
Ian Liew
She must have known his full name since they had a little tablet in their tent. When Yang Tiexin, under the guise of Mu Yi, asked Guo Jing what his father's name was he also answered "My father's name was Xiaotian". I'm not sure if she told him about his ancestry all the way back to Guo Sheng of the Water Margin, but he definitely knew his father.
Chapter 4 - Twin Killers of the Dark Winds:
Because Li Ping knew that in such a desolate and remote place as the
Steppe, any moment could bring with it many dangers. She knew that her
chances of ever returning to China were nearly non existent. If
something should happen to her suddenly, her son would never know the
name of his mortal enemy, and that would not do. She had long ago told
her son, over and over again, the name and appearance of Duan Tiande.
She was an illiterate farm girl and had always called her husband
‘Xiao-Ge’. She had heard other people call him ‘Brother Guo’ but had
never cared about what her husband’s real name was. This was why Guo
Jing had only ever known his father to be his ‘dad’ and did not know
that he had other names.
Guo Jing probably got his family history from the Freaks, and later Qiu Chuji. And of course, from Yang Tiexin.