He calls his sons brother son also
Your father's brother's son is your first cousin.
Your father's brother's son is your first cousin.
If it was a boy then he would be your sons half brother and if it was a girl she would be your sons half sister.
You do you call your sons's son your "grandson" !
Either your son or your nephew is the man.Your father's son is either you or your brother (including half-brother).If your father's son is you, then the original man is your son, (you are his father).If your father's son is your brother, then the original man is your nephew, (your brother is his father).Obviously if you have no brothers, than it must be your son.
Your father's brother's son is your first cousin. The English language does not have a name for the wife of a cousin. You would simply refer to her as "my cousin's wife."
A son of your father's brother would be your cousin.
Grandmother, if your Uncle is actually the brother of your mother or father.
The son of your half-brother's father is not related to you when the father is not your father.
It's you. You are the son of your father, but you are not your own brother.
Your father's brother's son is your first cousin and your daughter's second cousin.
If your father has only one son, that son cannot have a brother. Therefore the answer to the question is, "no one."