Your grandmother's sister is your great aunt
Just as your mother's sister is your aunt, your grandmother's sister is your grand-aunt, or, some would say, your great-aunt .
You would call your Grandmother's Sister Grand Aunt or Great Aunt.
Your great grandmother's sister is your great great aunt.
Correction:Your great grandmother's sister is your great aunt (not great great aunt).Your grandfather's sister is your great aunt. You are her great niece if you are female, or her great nephew if you are male.
Your grandmother's sister is your great aunt (some say grand aunt). You are her great niece or great nephew, depending on your sex.
She is your great-Aunt
Your Great Aunt
First cousins, as you share a common grandparent.
your cousin
Your grandfather's brother is your great uncle and your parent's uncle.
Real sister, half sister, or step sister
sister in law.
Your sister's sister is your sister.
Grandads-Robbers was created in 1971.
The duration of Grandads-Robbers is 1.45 hours.
No relation whatsoever. You will be an aunt or uncle to your sister's child and your brother-in-law's sister will be the child's aunt, but that's as close as it gets.
Your mothers sister is your Aunt
There is no relation. Your not blood at all so your just really good friends.
sister-in-law