Son-In-Law
Your son's wife's father is your son'sfather-in-law. There is no term in the English language for a familial relationship between you and your son's father-in-law. Put more simply, the two of you are not related.
Her father gives his daughter his LAST NAME and when she marrys the daughter takes the new last name of the husband,so,her father takes back his LAST NAME
Your daughter's step-sister would be your step-daughter.
Your aunt's daughter is your first cousin.
neice
Grandaughter.
She is the co-mother in law of you and your daughter's father in law is your co father in law. :-)
His name is Rodney
Neice
Niece
daughter-in-law
Your father's sister is your Aunt.