John Wilkes Booth had no children, therefore no grandchildren, great grandchildren or other direct descendants.
George Washington's great great grandson did not go to school. Washington had no children of his own so he had no great great grandson.
"Wilkes University has a very strong policy of non discrimination in admissions and academics. I would say that yes, Wilkes University is a great school for white and black people alike!"
Harvard College was where Henry Adams, grandson of John Quincy Adams and great-grandson of John Adams taught for many years.
The son of your grandson is your great grandson. You are his great grandmother or great grandfather.
Your father's great grandson could be your grandson, or your great nephew.
Your brother is a great great uncle to your great grandson. Your great grandson is your brother's great great nephew.
You grandson is great great nephew to your uncle. You uncle is great great uncle to your grandson
You Aunt is you grandson's Great-Great Aunt. Your grandson is your Aunt's Great-Great Nephew.
You grandson is great great nephew to your uncle. You uncle is great great uncle to your grandson
I don't think they knew one another. But Lincoln was a great admirer of the Booths, who were famous actors. John Wilkes Booth's father and two older brothers were much better known, though Wilkes Booth was developing his talent and had a growing following.
You and your great great aunt's great grandson are third cousins.