Ruling on marrying the daughters of maternal uncles and aunts for one who was breastfed by his maternal grandmother

Question: My son was breastfed by his maternal grandmother, and naturally, he became a brother by breastfeeding to his maternal aunts and uncles. Is it permissible for him to marry the daughters of his maternal aunts or the daughters of his maternal uncles?

Answer: If the child mentioned was breastfed by his maternal grandmother five times or more while he was within the first two years, he thereby became a brother to his maternal uncles and aunts, an uncle to the children of his maternal uncles, and a maternal uncle to the children of his maternal aunts. Therefore, it is not permissible for him to marry the daughters of his maternal uncles, because he became their uncle by breastfeeding, nor the daughters of his maternal aunts, because he became their maternal uncle by breastfeeding, as long as they are of his lineage. And success is from Allah.