If your uncle's cousin is also the cousin of your parents, you are first cousins once removed. If not, there is no relationship as you do not share a common ancestor.
2nd cousin, but if it's your Dad's 2nd cousin... then your relationship with that cousin would be a 3rd cousin.
His great uncle
Cousin. Your parents brothers and sisters are aunts and uncles. and the aunt and uncles children are your cousins.
your uncles daughter would be your cousin
Your uncles daughter would be your cousin.
your uncles daughter would be your cousin
Your brother's daughter's daughter is your great niece.
First answer:that would be your second cousin. It is legal in the united states to marry them due to genetics Second answer:Your question is: "What is the relationship of your uncles son daughter to you?" If you are asking, "What is the relationship of your uncle's son and daughter to you?" they are your first cousins.If you are asking, "What is the relationship of your uncle's son's daughter to you?" she is your first cousin once removed.
cousin
your uncles son is your cousin
Your second cousin because it would be your mum's cousin.
Her aunts/uncles daughter.