X does not have any sons or brothers but Y’s father is X’s father-son. What is Y to X?

X does not have any sons or brothers but Y’s father is X’s father-son. What is Y to X?

Explanation
  • X does not have any sons or brothers but Y’s father is X’s father-son. Daughter is Y to X
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  • Y term is used here as female.
  • X is a boy and Y is a girl.
  • X does not have a son or brother.
  • Y’s father and X are the same people.
  • Therefore, Y is the daughter of X.