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Your great uncle's son's son is his grandson. Your great uncle is the brother of one of your grandparents.
Children of siblings are first cousins to each other.
Grandchildren of siblings are second cousins to each other.
Great grand children of siblings are third cousins to each other.
So you and your great uncle's grandson are second cousins to each other.
What else can I help you with?
Who is the father of your sons brothers uncles aunts great grandads niece's son in relation to you?
your cousin
What relation are you to your nieces sons son?
Your niece's son's son is her grandson. He is your great great nephew and you are his great great aunt or great great uncle, depending on your gender.
What relation to you is your sisters sons son?
Your sister's son is your nephew His sons are your grandnephews, and his daughters are your grandnieces.
What does it mean to be the third son of the third son of the third son?
It means you have (or had) at least two uncles and at least two great-uncles, and that is all it means.
Fathers uncles relationship to his son?
great uncle
What relation is your sons kids to you?
Your son's children are your grandchildren.
What is your relationship to your uncles son?
His great uncle
What relation is your sisters sons kids to you?
Your sister's son is your nephew His sons are your grandnephews, and his daughters are your grandnieces.
What relation is your sons son to you?
Your grandfather's son's son could be:you (if you are a boy)your brotheryour first cousin
What relation is your brother to your sons son?
They share a common Grandparent. That makes them first cousins.
What is your nephew's son in relation to you?
Your nephew's son is your great nephew.
What is Relation of your son to your aunty?
Great aunty
