What is the closest relationship your daughter could have with your sisters nephews mothers sister?
She could be your sister's nephew's mother's sister's daughter, or aunt.
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You would be his Great Uncle or Great Aunt He in turn would be your Great Nephew.
She would be your cousin.
Your sisters daughter is your niece
There is no relationship at all.
You are your sister's son's aunt or uncle, depending on your sex. You are a great aunt or great uncle to your sister's granddaughter.
Your father's sister-in-law is either the wife of his brother, and your aunt; or she is the sister his wife (your mother) and therefore your aunt.
The sister of your mother-in-law and her children are not related to you . She is your children's aunt and her children are first cousins to your children.
Your daughter is your sister's niece, and your sister is your daughter's aunt.
The daughter of your mother's sister is your first cousin.
Your grandmother's sister is your daughter's great great aunt. Your daughter is the great great niece of your grandmother's sister.
Your sister's daughter would be considered your niece.
No thats your cousin and shes your blood. So it is not morally right to marry your cousin.
She is your third cousin.
You are an uncle or aunt, depending on your sex. If 'y' meant you - I've no relationship with her at all
Your sister's daughter is your niece.
The relationship to you would be your cousin !
The relation of the mother;s sister to daughter is niece-aunts.