You would call her your stepmother.
Your father's brother's son is your first cousin. The English language does not have a name for the wife of a cousin. You would simply refer to her as "my cousin's wife."
Matthew is either the son or step-son of his father's wife.
The judge is the criminal's father.
No. The second wife is stepmother to a father's son from a first marriage.
The son of a father's son is commonly referred to as a grandson.
The son of your father's new wife is your stepbrother. Her former husband is not related to you
Depends on your part in it. If you isn't the father to either of them, then there's no "real" relationship between them. Your exwife's son would be the "stepfathers stepson" to your current wife's son's. If you're the father to the current wife's son then the other would be "his father's stepson". If you're the father to the exwife's son but not the current, then the first son is "the son of his stepfather" to the current wife's son. If you're tha father to both then they're half brothers.
Your father's brother's son is your first cousin.
what i call my father elder brother's wife
Your father's brother is your uncle. His wife is your aunt.
Your father's brother's son is your first cousin.
If I am male, then my son's father has to be me, so I am Alex. If I am female, then my son's father is my husband, so I am Alex's wife.