Is it permissible to marry the daughter of the maternal uncle if the maternal uncle is a brother to the mother through rada'a (breastfeeding), and the questioner was breastfed by his grandmother (his mother's mother) along with this maternal uncle?

If you were breastfed by your grandmother five times or more during the first two years [of your life], then you are her son through breastfeeding, and your maternal uncles and aunts are your siblings through breastfeeding. Therefore, it is not permissible for you to marry your maternal uncle's daughter, because he is your brother through breastfeeding, and you are her paternal uncle through breastfeeding.