A grand uncle or great uncle is the brother of one of your grandparents.
she is your grandmother's sister
Tía is aunt. Bistía is great aunt or grand aunt.
you say call me great aunt not grand aunt
Your great aunt.
If your sister or brother had a grandchild, and you were a woman, you would be a grand aunt to that grandchild. Some people say great aunt, instead of grand aunt.
Great grand aunt.Great grand aunt.Great grand aunt.Great grand aunt.
Her grand great Aunt.
Yes, your grandfather's sister would be called by some your grand aunt and by others your great aunt.
Her grand great Aunt.
grand aunt
Great aunt; that is your grandmother's sister. Some people might call it grand aunt, although they might think you are calling them fat. :]
If you are truly a great aunt then no, grand aunt is fine, but if the family persists on calling you 'great aunt' then go with the flow. Both great aunt and grand aunt mean the same thing, the sister of one's grandparent. Some communities prefer one and some prefer the other.
He would be your grand nephew; you would be his great-aunt.