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There are a range of possibilities, depending on the exact relationship. If the niece is the daughter of one of his cousins (i.e., they are the child of one of the cousin's brothers or sisters) they would be a second cousin. If they are the child of one of the cousins' brother's or sister's spouse, there is no relationship, though most families would probably refer to them as a distant cousin.
What else can I help you with?
What relation is your niece to your stepson?
They are of no blood relation. But they are cousins by marriage or 'step-cousins' as such.
What relation is your daughter to your niece?
cousins
What relation is your son to your niece?
Your son and your niece are first cousins.
What is the relation between my child and my niece's child?
Your child and your niece are first cousins to each other. Your child and your niece's child are first cousins, once removed.
What relation is your great niece to your daughter?
Your great great niece is the granddaughter of your niece or nephew. Your daughter and your niece or nephew are first cousins. Your daughter and your great great niece are first cousins, twice removed.
What is your grandma's great niece in relation to you?
You would be second cousins.
What is the relation of your granddaughter and grand niece?
Your granddaughter and grand niece are second cousins to each other.
Your daughter is what relation to your nieces son?
Your daughter and your niece are first cousins. Your daughter than your niece's son are first cousin's once removed. Your daughter's child and your niece's child are second cousins to each other.
What relation is your great granddaughter to your niece?
Your granddaughter and your grandniece are second cousins or third cousins to each other
What relation is my husband's niece to our granddaughter?
Your children and your husband's niece are first cousins. There is a difference of one generation between them. That makes them first cousins once removed.
What relation is my granddaughter and my niece?
Your niece and your son or daughter are first cousins. That would make your niece and your grandchild first cousins once removed. Your niece's child and your grandchild are second cousins.
What relation are you to your father's brother's?
Your fathers brothers are your uncles. You are their nephew, or niece.
