Your great uncle is the brother of one of your grandparents, so his grandfather is also the grandfather of one of your grandparents. The grandfather of your grandparent is your great great great grandfather.
Yes your grand uncle is a brother of your grandfather, or of your grandmother. Some people prefer the term "great uncle."
Yes, because if your parent's brother is your uncle, then your grandparent's brother is great uncle, because they are both in the same generation.
The uncle of your great grandfather is your great-great-great uncle. Your great uncle (also called your grand uncle) is the brother of your grandparent and your parent's uncle.
Your grandfather's brother is your great uncle and your parent's uncle.
Your grandfather's brother is your great uncle (some would say your grand uncle). You are his great niece (if you are a girl) or his great nephew (if you are a boy).
The brother of your great great grandfather would be your great great granduncle.
Your father's brother is your uncle. Your Grandfather's brother is your great uncle. Your Great Grandfather's brother is your great great uncle.
Your grandfather's brother is your great uncle
Your grandfather's brother is your great uncle.
Grand Aunt or Grand Uncle depends what gender you are.
Your grandfather's brother is your Great Uncle.
The son of your great grandfather's brother was your grandfather's first cousin. That makes him your first cousin, twice removed.
Your grandfather's uncle is your great great uncle. Your grandfather's brother would be your great uncle
Your grandfather's brother is your great uncle. The wife of your great uncle is your great aunt.
Well your father's father is your Grandfather. And it depends how your uncle is related to your grandfather. Your uncle could be your grandfather's son, or your grandfather could have a sibling who's child is your uncle- which would make him your Grandfather's nephew.