Your great aunt is the sister of one of your grandparents. The wife of one of your grand parent's brothers is your great aunt by marriage.
Another way to look at it is that your great aunts are the aunts of one of your parents.
She is your mother's or your father's aunt. Or you could say she is one of your grandparent's sisters
Your her great great aunt!
You and your great great aunt's great grandson are third cousins.
Your aunt is your children's great aunt, and they are her grandnieces and grandnephews.
No if you Great aunt is blood related to you.Even if shes you Great Aunt by Maringe is not best even then.
You may be related to your great aunt's cousin through your great great grandparent, who is also her grandparent.However, your great aunt could also have cousins from the side of her family that is not related to you. (Children of siblings of her father, if her mother was the sister of your great grandparent.) Those cousins are not related to you.In addition, your great aunt could be your great aunt because she married the brother of your grandparent. In that case, none of her cousins are related to you.
Your parent's aunt is your great aunt. Your great aunt's daughter's child is her grand child. You and your great aunt's grandchild are second cousins.
Your her great great aunt!
If Joe's grandfather and Jane's great aunt were first cousins, and Jane's great aunt was the sister of her grandparent, then Joe and Jane are related as third cousins. But if Jane's great aunt is married to the brother of her grandparent, Joe and Jane are not related.
Your aunt's great uncle's father is her great grandfather, or is not related to her at all if the great uncle married a sister of her grandfather).He would then be your great great grandfather - or not related to you at all.
Your great aunt's husband is your great uncle, but his siblings and their children and grand children are not related to you. The grandsons of your great aunt's husband's siblings are his great nephews (not related to you). On the other hand, all of your great aunt's great nephews are also her husband's great nephews. These great nephews are the grandchildren of your great aunt's siblings. They are you (if you are a boy), your brothers (if you have any), your male first cousins and your male second cousins on whatever side of your family your great aunt is on.
Your grandfather's sister is your great aunt. The grandchildren of your great aunt are your second cousins. Their children, the great grandchildren of your great aunt, are your second cousins, once removed.
Your grandfather's sister is your great aunt. The grandchildren of your great aunt are your second cousins. Their children, the great grandchildren of your great aunt, are your second cousins, once removed.