Aunt's
Tom Sawyer's aunt was Aunt Polly.
Great aunt.
Your great aunt.
Aunt
Your aunt is your daughter's great aunt. Your daughter is your aunt's great niece.
If the dad's sister's aunt is also your dad's aunt, then your dad's aunt is your great aunt. However if she is not your dad's aunt, then she is your aunt's aunt and not necessarily related to you.
Your father's aunt is your great aunt.
Your father's aunt is your great aunt.
Your father's aunt is your great aunt.
Your Aunt is your children's Great Aunt.
aunt, ant