Your sister's son will call you his uncle, if you are a man, or his aunt, if you are a woman.
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 cousin man.
The answer is son.
Your half-brother...
Your uncle would be your sons great uncle. Normally your Son would also call him 'Uncle .... '
granddaughter
Mother in-law
Fred
Sugar Daddy
a man with 10 wifes
She was meant to be a man?