I think that would be your cousin.
great uncle
His great uncle
your cousin
Your aunts and uncles are the sisters and brothers of your parents.
the son would be the nephew
Your mother's brother is your uncle.The children of your aunts and uncles are your first cousins.
All my father's brothers and my mother's brothers are my uncles.
Great uncle / Great nephew
Your father's brother is your uncle. You are his niece (if you are female) or his nephew (if you are male).
Cousin. Your parents brothers and sisters are aunts and uncles. and the aunt and uncles children are your cousins.
your second cousin- in law or by her name lol
No because that would be your cousin