Thew brother of your mother's cousin is also your mother's cousin, and the same kind of cousins - first second, etc. So the question is really, "How are you related to you mother's cousin's granddaughter."
Your mother's first cousin's grandchild is your second cousin, once removed.
3rd cousin I think:-)
Your daughter and your first cousin are first cousins, once removed.
First cousin once removed.
Your mother's brother is your uncle. Your uncle's daughter is your first cousin. Any child of your first cousin is your first cousin, once removed.
Great niece
I think it would be your daughters 2nd cousin. (:
her 7th cousin.
First cousins, twice removed. Aunts daughter is your cousin. Aunts daughters daughter is cousin once removed Aunts daughters daughters daughter is cousin twice removed.
the daughter's cousin
Your aunt's daughter is your first cousin.
She would be your 2nd cousin.
It would be a second cousin.