Alright, for the Administrator:
In chapter 1, Noh mentions that he was beaten by him.
In chapter 23 we see his outline.
When he later met with Noyas granddaughter (Xiaoxiao/Soso/whatever people translate it to) you could see it even more clearly. Their relationship was established years ago, is it really that big a reveal? :|
Also, Noh is an orphan. Does he know that his family name is Noh, tho, or is that something he came up with himself? The translation of these things can be iffy (it's also written in chapter 1). I doubt that the granny would let him grow up on the streets if they were related (unless she didn't know about him or thought he died young) but it would be cool if he actually had a grandma. It would complicate things in a very nice way. Could also explain why his daughter is so smart (it could also all be due to the mother but she died too soon for us to learn exactly how smart she was).