How are you related to your grandfather's brother?
Your grandfather's brother is your great uncle or grand uncle. You are his great nephew (if you are male) or his great niece (if you are female).
Her father is Zeus and her mother is Leto. She has a twin brother named Apollo. Her grandfathers are Cronos and Coeus. Her grandmothers are Rhea and Phoebe. Her uncles are Poseidon and Hades. Her aunts are Hera, Demeter, and Hestia. Since all the gods are related, she has a very large extended family.
You are not related to all of your brother-in-law's family, but you are related to some of them. You are related to your brother-in-law. You are related to his wife, your sister. If he and your sister have children, you are related to them - they would be your nieces and nephews. But you are not related to your brother-in-law's siblings, cousins, parents, aunts, uncles, grandparents, etc.
Your brother-in-law could be the brother of your spouse. In that case, your sister is not related to him. However, your brother-in-law could be the husband of your sister. In that case, your sister is related to him as his wife, or, if she is another sister, he is her brother-in-law, and she is his sister-in-law.
Lets explain this step by step as so many people get all this genealogy family stuff mixed up 1.Your Grandfathers niece(this would have to be your grandfathers brother(your great uncle),or sister(your great aunts)daughter to be your grandfathers niece. 2. This niece of your Grandfather would be the first cousin to your mother or father, 3. This niece would be your "SECOND COUSIN"
Your cousin's half-brother may or may not be related to you. Your cousin has two parents, only one of whom is related to you (i.e. is the sibling of one of your parents). You cousin and his half-brother have only one parent in common. If the half-brother is the child of you parent's sibling, then the half-brother is related to you and is your cousin, too. If the half-brother is not the child of your…
Your aunt is the sister of one of your parents or the wife of the brother of one of your parents. If your aunt is the sister of one of your parents, then her brother is your uncle, or your father. If your aunt is the wife of the brother of one of your parents, then her brother is not related to you.