your second cousin
You would be third cousins.
Second cousins once removed.
Two people whose great grandmothers were sisters are third cousins to each other.
Your sister would be her great aunt and she would be your sisters great niece.
First cousins once removed.
If your great grandmothers were sisters, then you are third cousins.
Second cousins once removed. They would be your mother/father's second cousins.
They can if a court agrees to the proposed arrangement.
I believe them to be your second cousin, possibly once removed. Grandmother's siter= Grandaunt Grandaunt's grandchild = Cousin (Their mother is your aunt assumably?) Cousin's child= Second cousin.
Your daughter and your sister's child are first cousins. Your daughter and your sister's grandchild are first cousins, once removed.
Two people whose grandmothers are sisters are Second Cousins.
Your great uncle's grandchild is your second cousin.
Two people whose grandmothers were sisters are second cousins to each other.
Your grandmother's sisters are your Great Aunts.
She is your great-Aunt