The Prohibition of the Maternal Uncle and His Brother

Question:
Is it permissible for me to meet my mother's maternal uncle and her brother? Or are they not mahram to me?

Answer:
Your mother's maternal uncle and your mother's brother are mahram to you. Your mother's brother is your brother, and her maternal uncle is your maternal uncle. Likewise, your father's brother and your father's maternal uncle are both mahram to you, even if the ancestor is high up, such as your father's grandfather, or your mother's grandfather, or your mother's mother.
The point is that a person's maternal uncle is a maternal uncle to his descendants. So your mother's maternal uncle is a maternal uncle to you and your descendants, and your mother's brother is a brother to you and your descendants. Likewise, your father's maternal uncle and your father's brother are a maternal uncle to you and your descendants, and a brother to you and your descendants, no matter how distant they are. Yes.