Blood Relations Questions

Introducing a girl, a boy says, "She is the daughter of my father's only brother­in­law". How is the girl related to the boy?

A woman pointing to a man said, "He is the widower of my uncle's brother's daughter." How is the man related to the woman?

Abhishek is Byomkesh's brother and Vimal is Jackie's father. Ella is Byomkesh's mother. Abhishek and Jackie are brothers. How is Ella related to Vimal?

Introducing a man, a woman said that, "He is the son of my mother's brother's father's son." Then how  is the woman related to the man?

Punit said to a lady, "The sister of your father's wife is my aunt". How is the lady related to Punit?

Introducing a girl, Raju says, "She is the daughter of my grandfather's son's daughter". How is the girl related to Raju?

If X has two sisters - Y and Z, and W's mother is the sister of Y's father, then W is Z's ___.

Sourabh's mother is the daughter of Ajeet's only sister. Ritik is the grandson of Ajeet. How is Ritik related to Sourabh?