Your brother's daughters are your nieces
4 daughters, 3 sons.
Uncle
Your brother's daughters are your nieces
Nieces are the daughters of your brothers and sisters. Nephews are the sons of your brothers and sisters.
If there are 6 daughters and each daughter has one brother, that means there are 6 brothers. 6 daughters and 6 brothers = 12 children by using addition.
THEY DONT SELL THEIR DAUGHTERS
She is your niece.
Granddaughter
Grandson :)
You call your daughter's baby, your grand-duaghter.
You would call your sister's daughter your niece.
Nieces.