
My first cousin’s daughter is ... what? My second cousin? No, those are more distant kinfolk who only share great-grandparents. My mother’s sister’s son’s daughter is my first cousin, once-removed.
I think.

My first cousin’s daughter is ... what? My second cousin? No, those are more distant kinfolk who only share great-grandparents. My mother’s sister’s son’s daughter is my first cousin, once-removed.
I think.