Is it permissible for "Azad," the youngest son of "Juwairiyah," to marry the daughter of his maternal uncle "Ahmed," given that "Juwairiyah" breastfed her brother "Ahmed" with the milk of her son "Nuri" only in 1957, without her knowledge of the rulings on breastfeeding, and without knowing the number of feedings, and two other women briefly shared with her in breastfeeding "Ahmed" due to "Ahmed's" mother's illness, and with the intention of saving his life, not adoption, and do the exceptions of mahramiyyah (prohibition of marriage) by breastfeeding or degrees of kinship apply in this case?
Ahmad, by virtue of having been nursed by the aforementioned mother, becomes a brother to all her children and to anyone else she nursed from outside her immediate family. Therefore, it is impermissible for any of her sons to marry Ahmad's daughters, because they are in the position of his brother's daughters.
If the last mentioned refers to the son himself, then it is impermissible for him to marry the daughter of anyone who was nursed by his mother, because she has become in the position of his niece (daughter of his brother or sister).
However, if the last mentioned refers to the son's son, then it is permissible for him to marry the daughter of anyone who was nursed by his father's mother, because she has become in the position of his female cousin (daughter of his paternal uncle or aunt).
These rulings are contingent upon the certainty of five known acts of suckling having occurred. If the suckling is doubtful or its number is uncertain, then the prohibition is not established. It is more pious to refrain from marriage to avoid disagreement.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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