You and the son of your uncle are first cousins to each other.
Your granpa's brother's son's son is your 2nd cousin.
Your Step-brother. If he isn't your brother but he is your father's son, he's you.
Your brother-in-law's son is your nephew
Your half-brother's daughter is your niece. Your niece and your son are first cousins to each other.
Your brother's son is your nephew. Therefore, your brother's son’s son would be your great-nephew. In summary, your brother's son son is your great-nephew.
cousin
Well, your cousin's brother is also your cousin, and a cousin's son is also your cousin.
jew face
There is no genealogical relationship. He is just your son-in-law's brother.
Your brother's son or daughter is your nephew or niece respectively.
Your son would be the uncle of his brother's son.
The sister's son would be the nephew of her brother.