You are both second cousins once removed. The common ancestors of you and of the your great grandmother's sister's daughter's son are one of your sixteen pairs of great great grandparents, who are also one of the eight pairs of his great grandparents. Children of your parents' siblings ar your first cousins; of your grandparents' siblings, are your second cousins; of your great grandparents' siblings are your third cousins. Your great grandmother's sister's daughter's son is a grandson of your great grandmother's sister, and he is the second cousin by birth of one of your parents. You are therefore at one further remove than he is from the common ancestors of you both, and therfore second cousin once removed. (Of course, I am considering only people who are not unrelated in other ways, which could complicate matters--there was a popular song in the middle of the last century which had the title of "I am my own grandpa'.
Your her great great aunt!
Your sister's granddaughter is your great niece and you are her great aunt (if you are a woman) or great uncle (if you are a man).
Great neice
Your great uncle's granddaughter is your second cousin.
Your mothers sisters Granddaughter is your second cousin
Your her great great aunt!
WHAT relationship* is your Gramps to your great granddaughter? pretty tricky but (distant sisters one off)
You and the granddaughter of your grandmother's brothers, and sisters, are first cousins.
Your nephew's granddaughter is your great great niece. Depending on whether you are male or female, you are that child's great great uncle or great great aunt.
If your great great uncle (the brother of your great grandparent) had a great great granddaughter, you would be third cousins, once removed.
Yes, she would be your great-aunt.
The great-great-great-granddaughter of Uranium-238 is Radium-226. For more information, please see the related link below.