Ruling on marrying one's maternal brother's paternal sister

Question:
I have a brother on my mother's side, and he has a sister on his father's side. Is it permissible for me to marry her?

Answer:
Yes, if there is no breastfeeding relationship between you, there is nothing wrong with it. Your brother on your mother's side has a sister on his father's side, so you are marrying his sister on his father's side. Since his father is not your father, you only share a mother. If you marry your maternal brother's sister, who is his sister on his father's side, and there is no breastfeeding relationship or other kinship between you, there is nothing wrong with it.