You would be second cousins.
Your grandaughter would call your brother her great uncle.
Grandaughter
Your grandfathers brother to you is your Great Uncle!
Your grandfather's brother is your great uncle.
Your grandfathers' sisters' grandchildren are your second cousins.
grandaughter in-law
Your daughter's daughter is your grand daughter. Your nephew's daughter is the granddaughter of your sibling (your brother or sister) The grandchildren of siblings are second cousins.
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
grandaughter
Your daughter's grandfather's brother's son is her mother's or father's first cousin and her first cousin, once removed.
Ralph Rennie is not related to Tom Rennie . I know this because he was my grandfathers brother. As far as I know we do not have a relation called Tom Rennie. Answer from - Karen Mark of St. Andrews, Manitoba
Yes, on his grandfathers side