Who is your brother or sisters daughter called?
Answer Your brother or sister's daughter is called 'your niece.'
Your brother married a women who had a daughter to another man She had your brother adopt her daughter now they got devoriced Can your brother sign off all rights to this child?
What is sisters daughter called has?
What should you call your sisters live in boyfriend. She wants him to be called brother in law but they are not married so can we call him that?
Just tell Her that you miss her and that you want her to come someday ....
Brother in law daughter is called?
If the brother-in-law's daughter is also your sister's daughter, she would be a niece. Otherwise, there is no relationship.