My niece's daughter is my great niece.
Your daughters are great aunties if their nieces have kids. Your daughters kids are your grand children.
The daughters of your sister are your nieces.
Assuming he is your only sibling with female children, you would have two (2) nieces.
Your brother's daughters are your nieces
Your brother's daughters are your nieces
They would be great nieces or great nephews.
Nieces are the daughters of your brothers and sisters. Nephews are the sons of your brothers and sisters.
I can give you several sentences.My nieces are coming for a visit.Are those girls your nieces?Nieces are the daughters of your brother or sister.
Nieces.
They are your grand-nephews and grand-nieces or great-nephews and great-nieces.
If you have two nieces who are not sisters but are each the daughters of your siblings, the two nieces are first cousins. If they each have a daughter, those daughters are second cousins to each other.
It says what relation are your brothers nieces to you.... It could be your child or your niece also causes you can have two brothers and it may be the other ones kids. Or of course it could be your brother's new wife kid by another man making her no relation.