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.
you would just be "in laws"
daughter in law
The correct plural is fathers-in-law .Fathers is the noun, in law the adjective; fathers in law, not father in laws which implies one father, but with multiple relationships.
The possessive form for the plural noun sons-in-law is sons-in-law's. Example: My sons-in-law's party was a special occasion.
Father in law.
Father in law
In Hindi, father-in-law is called "ससुर" (sasur).
She is the co-mother in law of you and your daughter's father in law is your co father in law. :-)
The possessive form of the plural noun sons-in-law is sons-in-law's.example: Both of my sons-in-law's birthdays are on the same day.
It's called the daughter-in-law.
Where English is spoken, the father of your husband is called your father-in-law.
The parents of a husband are not related to the parents of his wife. Answer There is no relationship at all as there is no blood tie with either of the mothers. If however the mother in law was the mothers sister, then that would be the relationship i.e. sister.