He would be your Great Uncle, you would just address him as uncle.
Your grandmother's brother is your great-uncle.
Great uncle :D
Great Uncle
Your grandfather's brother is your great uncle.
He would be your great great uncle, but you could call him whatever endearing name you both prefer. my great grandfathers brother or my great uncle
Your grandfather's uncle is your great great uncle. Your grandfather's brother would be your great uncle
Your grandfathers brother to you is your Great Uncle!
You would be second cousins.
할아버지 (Hara buhjee)
Your father's grandfather is your great grandfather.
Your daughter's grandfather's brother's son is her mother's or father's first cousin and her first cousin, once removed.
Grandfather, grandad, grandpa..depends on the person
Your Grand Uncle(great uncle) would be your grandmother or grandfathers brother.
You still call your brother, your brother.
The possessive form of the plural noun grandfathers is grandfathers'.example: Both of my grandfathers' names are George.