In the English language, your sister's son is your nephew, regardless of whether your sister is older or younger than you are. All children of your siblings are either your nephew (if a boy) or a your niece (if a girl).
Your brother's son is your nephew and you would be their aunt if you are a female and their uncle if you are a male.
The son of your brother, or of your sister, is called your nephew.
In English he is your nephew.
You call your older brothers son a nephew
They would be your first cousin.
That would be your niece or nephew.
Nephew
cousin
Alludu
Your father's brother's son is your first cousin and your daughter's second cousin.
Your Step-brother. If he isn't your brother but he is your father's son, he's you.
your
Your son will be a nephew to your brother, and will call him "Uncle".
the father, the elder brother,the servants.
The son of your brother is your "nephew".
The son of your brother is your "nephew".
your 5th cousin
Your cousin.
cousin!