In everyday conversation, you would simply say, "My wife's cousin."
To be more formal, you might say, "first cousin-in-law."
Just Aunty. That's it........ You can call your uncle's wife "Aunt" with her name afterwards. Example: Aunt Margaret
your great uncle
The daughter of your husband's brother is your niece.
The English language has no specific term for a relationship between your uncle and your wife. Your uncle will usually call her "my nephew's wife" and she can call him "my husband's uncle."
Mother's sister: Mavashi Father's sister: Aatya (soft "t") Maternal uncle's wife: Maami Paternal uncle's wife: Kaku
uncle -in- law
You and your wife are great uncle and great aunt to your wife's sister's granddaughter. The granddaughter is your great niece.
No, but you might call him uncle if you like him.
He's your uncle-in-law
If your uncle is the brother of one of your parents, his sister-in-law is either the sister of his wife or the wife of his brother. If his sister-in-law is the sister of his wife, she is not related to you, and neither is her daughter. If his sister-in-law is the wife of his brother, then she could be your mother and her daughter would be your sister, or you if you are a girl. Otherwise she is your aunt (the wife of another brother of one of your parents) and her daughter is also the daughter of a brother of one of your parents and thus your first cousin. If the daughter is from a previous marriage, then she is not related to you, but you may choose to treat her as a first cousin, especially if she was very young when her mother married your uncle.
daughter...daughter in law.
Your daughter's paternal first cousin is your first cousin, or your husband's first cousin. Your first cousin's father is your uncle. Your uncle's wife is your aunt. The son of your aunt and uncle is your first cousin and your daughter's first cousin, once removed. If your uncle's wife has a son fro a previous marriage, that son is not related to you or to your daughter, although you may find is socially or personally desirable to treat him as if he were your first cousin.