2nd cousin once removed
its either your grandma or great aunt
your grandma
I call my grandma's aunt, Great Aunt. Maybe that's what you call her, but she is of course your great-great-aunt.
it is your great aunt
If the great grandmother of A is the aunt of B's grandfather, then A and B are third cousins.
You granddaughter is a great great niece of your aunt. Your aunt is your granddaughter's great great aunt.
She is your aunt. This is true in most traditions. English does not distinguish between an aunt by marriage (father's brother's wife) or an aunt by blood relation (father's sister).
Your aunt is your daughter's great aunt. Your daughter is your aunt's great niece.
Your Aunt is your children's Great Aunt.
Your grandmother's sister-in-law is your great aunt and your grandson's great great great aunt.
The daughter of your aunt is your first cousin. The daughter of your great aunt is your first cousin, once removed.