If you're a boy, you're their Uncle, and if you're a girl, you're their Auntie.
In other words, they are your nephew. If your brother goes on to have a daughter, they are your neice.
I hope I helped,
xxx
Your son will be a nephew to your brother, and will call him "Uncle".
The son of your brother is your "nephew".
The son of your brother is your "nephew".
Your brother's grandson is your great nephew.
Your mother's brother's son is your cousin.
He calls his sons brother son also
Your father's brother's son is your first cousin.
The son of your parents is your brother.
Your father's brother's son is your first cousin.
You call him your nephew. (pronouced nes-few)
Yes, for a nephew is sister's son, brother's son, wife's brother's son, wife's sister's son, husband's brother's son, husband's sister's son
brother