Your grandfather's 3rd great grand uncle (or great-great-great-great uncle) is the brother of your 5th great-grandparent (or great-great-great-great-great grandparent).
He is therefore your 6th great grand uncle (or great-great-great-great-great-great-great uncle)
She will be your aunty
Two people whose grandfathers were brothers are second cousins to each other.
She would be your great grandmother
Your grandfather's great nephew is your second cousin.
Your grandfather's cousin is your cousin twice removed. Her husband has no direct relationship to you.
He would be your great-great uncle.
The possessive form of the plural noun grandfathers is grandfathers'.example: Both of my grandfathers' names are George.
Most likely they would not be related to you
i think ALL YOU HALF NOT HALF &^what is that
Your grandfathers' sisters' grandchildren are your second cousins.
If the grandfathers were 1st cousins, the grandchildren of each grandfather are 3rd cousins to each other.
Your great grandfather's sister is your great great aunt. You are her great great niece or great great nephew, depending on your sex.