Your grandma's brother is your parents' uncle, so he is your great uncle. if he got married and had a son, then your parents now have a cousin.
People with the same grandparents are first cousins. People with the same great grandparents are second cousins. This man is one generation away from you, so he is your second cousin, once removed.
Your uncle and his sister have the same mother, your grandmother.
Your grandmother's grand father is your great great grandfather.
Your great great grandfather's son is either your great grandfather or your great great uncle.
My great grandmas niece's son
If you have no siblings but your daughter has an uncle, he is the brother of your spouse, your brother-in-law.
you are second cousins.
1st cousin 2x removed
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
First cousins twice removed.
you will be his great great grand son/daughter..:)
Both grandmothers are living. Their great grandmother died of cancer.
no problem man! enjoy
If the grandmother has custody
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
You are third cousins.
my brother doesn't have a son.