pappy, pa, gramps, and grandpa
Your grandfather's brother is your Great Uncle.
Your grandfather's uncle is your great great uncle. Your grandfather's brother would be your great uncle
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's granddaughter is your second cousin.
The son of your great grandfather's brother was your grandfather's first cousin. That makes him your first cousin, twice removed.
The children of your grandfather's brother are your first cousins, once removed. You can also call them by their names.
Your great great grandfather.
Your father's grandfather is your great grandfather.
Your great grandfather
Your great grandfather
Your great great grandfather.
Your grandfather's brother is your great uncle.
Your father's grandfather is your great grandfather.
You call him grandfather.
He would be your great, great grandfather, but you could call him whatever endearing name you and he prefer -- Granddad, Papa, Grandpa, etc.
a grandfather*draw out the vowels an roll the r
Your grandfather's brother is your Great Uncle.