Your grandmother's nephew would be your parent's first cousin. They would be your first cousin once removed. Since the child of your cousin is a generation away from you they are the once removed.
Great Great Uncle
He would be your Great, Great Uncle. You are his Great, Great Niece or Nephew.
The children of your grand uncle (also called your great Uncle) are your first cousins, once removed. They are your parent's first cousins.
Your grandmother's nephew is first cousin to one of your parents and first cousin, once removed, to you.
Your granddaughter is your uncle's great great niece. He is her great great uncle, or some would say great grand uncle.
Great Great Uncle
Your mother's uncle is your great uncle.
She would be your Great Aunt.
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
Your sister's son is her grandson and your great nephew. Some use the term "grand nephew."
It depends on which "half" of your half-brother the nephew is related to. Your half-brother shares your father or mother, but not both. If your half-brother's nephew is related to the same parent you are related to, your half-brother's nephew would also be your nephew. If related to the other parent, he would not be related to you.
Your nephew's first cousin may or may not be related to you, depending on how the cousin is related to your nephew. Your nephew's cousin may be your child, or the child of one of your brothers or sisters. Your nephew is related to you by being the son of your sibling. That sibling has a spouse who may also have borthers and sisters. The children of any of those brothers and sisters are also your nephew's first cousins, but are not related to you.
There is no word in the English language for a relationship between grandmothers of related grandchildren
Your nephew's son isyour great nephew. You are his great aunt or great uncle.
Your grandchildren and your nephew are related t each other as first cousins, once removed.
The nephew of a wife and the nephew of her husband are not considered to be related to each other. However, both are nephews of the wife and the husband, and the wife and husband are aunt and uncle to both nephews.
Your grandson and your nephew are first cousins, once removed.
If your great great grandmothers were sisters, your common ancestors are your great great great grandparents. That makes you 4th cousins.
NO
No