Marrying the maternal uncle's half sister from the father

Q: A man wants to marry the sister of his half maternal uncle; is this marriage valid?

A: This marriage is permissible provided that your mother is your uncle's half-sister and this woman is your uncle's sister from the father's side. This is because she is not from the women who are unlawful for you to marry. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.