Kinship, Lineage and Marriage Impediments

This subtopic gathers questions on kinship and what follows from it. These include who is a mahram, a close relative a person cannot marry. They also include impediments to marriage by lineage, marriage and breastfeeding, and how paternity is established or denied.

Questions readers ask here:

Travel with or without a mahram belongs under Travel and Mahram.

73 questions

Is it permissible to marry the daughters of maternal half-sisters if the grandmother breastfed one of the sons and the mother breastfed her full brother along with her son?
My brother wants to marry my sister through fosterage. Is that permissible?
Is it permissible for the questioner’s daughter to marry her nephew, the son of her brother, whom her mother did not breastfeed, given that the questioner’s mother breastfed two of his sisters from his mother, and her brother’s wife breastfed two of the questioner’s brothers?
Is the prohibition of marrying a betrothed girl established in the event of doubt regarding the occurrence of breastfeeding between the suitor and the girl's maternal aunt, given the mother's testimony that she does not know whether the breastfeeding occurred within the two years and the number of satiating feedings?
Is the son of my mother's husband, whom my mother breastfed along with my brother, considered a mahram to me, even though he is younger than me?
Would the paternal aunt who breastfed her daughter's son be considered a prohibitive relation to her brother's daughters?
Is the wife forbidden to her husband if the husband finds out after the marriage that the wife's maternal uncle was suckled by the wife's mother, and that the wife's sister was suckled by the mother of the wife's maternal uncle?
Is it permissible to marry a paternal cousin who was nursed by the elder sister of the prostrator (sajidah)?
Is it permissible for me to marry a girl who suckled with my paternal aunt?
Is it permissible to marry a girl whose mother was nursed by my mother in infancy, without recalling the number of times she was nursed?
Is it permissible for me to marry my maternal cousin, who was nursed by my half-sister, knowing that my sister nursed her alongside her eldest daughter, and the number of nursings is unknown?
Is the breastfeeding sister of her husband's brother lawful for her husband and his brothers?
Is it permissible to marry one's paternal aunt's daughter if the questioner was suckled by his paternal aunt's mother (his paternal grandmother), who is not his father's mother, and is it a condition to have witnesses to the suckling?
Is it permissible to marry the daughter of one's maternal aunt if the mother was breastfed by the fiancée's mother?
Are the daughters of the questioner considered sisters to the children of her sister by rada'ah (nursing), and thus is marriage between them forbidden, given that the nursing was done with a pump and did not exceed five times, and both girls were infants in the incubator?
Is it true that a man who was breastfed by his wife's mother is not permitted to marry her sister?
What is the ruling regarding a woman marrying the older brother of her foster sister, knowing that the number of foster sucklings was less than five, and that she is a mother of six children?
What is the explanation of the Hadith: "What is prohibited by fosterage is what is prohibited by lineage," and does it include marrying the sister of a foster brother if they were both suckled by the same woman?
Is it permissible for the nephew who was suckled by the mother to marry the sister, and what is the ruling on the marriage of the sons of the nephew who was suckled by the mother to the daughters of the brothers and sisters?
Do the husband and brother become unmarriageable to each other if the husband was suckled by the brother's grandmother?
Will the maternal uncle become a father through breastfeeding if his wife breastfeeds an infant? And will the infant's wife be prohibited to her maternal uncle? And is it permissible for her to remove her hijab in front of him? And are the maternal uncle's wife's sisters prohibited to the infant?
Does one suckling prohibit if the aunt suckles her sister's daughter with her young son, and is it a condition to complete five sucklings within two years for the prohibition?
What is the ruling on the marriage of the son of "S" to the daughter of "P" after the daughter of "P" was breastfed by one of the children of the second wife, and what is the fate of their children?
Is it permissible to marry one's maternal aunt's daughter after the mother nursed the maternal aunt's daughter, and the maternal aunt nursed two of the questioner's siblings, without specifying the number of nursings, and does the ruling of fosterage cease if the number is not specified?

Kinship, Lineage and Marriage Impediments

Is it permissible to marry the daughters of maternal half-sisters if the grandmother breastfed one of the sons and the mother breastfed her full brother along with her son?

My brother wants to marry my sister through fosterage. Is that permissible?

Is it permissible for the questioner’s daughter to marry her nephew, the son of her brother, whom her mother did not breastfeed, given that the questioner’s mother breastfed two of his sisters from his mother, and her brother’s wife breastfed two of the questioner’s brothers?

Is the son of my mother's husband, whom my mother breastfed along with my brother, considered a mahram to me, even though he is younger than me?

Would the paternal aunt who breastfed her daughter's son be considered a prohibitive relation to her brother's daughters?

Is the wife forbidden to her husband if the husband finds out after the marriage that the wife's maternal uncle was suckled by the wife's mother, and that the wife's sister was suckled by the mother of the wife's maternal uncle?

Is it permissible to marry a paternal cousin who was nursed by the elder sister of the prostrator (sajidah)?

Is it permissible for me to marry a girl who suckled with my paternal aunt?

Is it permissible to marry a girl whose mother was nursed by my mother in infancy, without recalling the number of times she was nursed?

Is it permissible for me to marry my maternal cousin, who was nursed by my half-sister, knowing that my sister nursed her alongside her eldest daughter, and the number of nursings is unknown?

Is the breastfeeding sister of her husband's brother lawful for her husband and his brothers?

Is it permissible to marry one's paternal aunt's daughter if the questioner was suckled by his paternal aunt's mother (his paternal grandmother), who is not his father's mother, and is it a condition to have witnesses to the suckling?

Is it permissible to marry the daughter of one's maternal aunt if the mother was breastfed by the fiancée's mother?

Are the daughters of the questioner considered sisters to the children of her sister by rada'ah (nursing), and thus is marriage between them forbidden, given that the nursing was done with a pump and did not exceed five times, and both girls were infants in the incubator?

Is it true that a man who was breastfed by his wife's mother is not permitted to marry her sister?

What is the ruling regarding a woman marrying the older brother of her foster sister, knowing that the number of foster sucklings was less than five, and that she is a mother of six children?

What is the explanation of the Hadith: "What is prohibited by fosterage is what is prohibited by lineage," and does it include marrying the sister of a foster brother if they were both suckled by the same woman?

Is it permissible for the nephew who was suckled by the mother to marry the sister, and what is the ruling on the marriage of the sons of the nephew who was suckled by the mother to the daughters of the brothers and sisters?

Do the husband and brother become unmarriageable to each other if the husband was suckled by the brother's grandmother?

Will the maternal uncle become a father through breastfeeding if his wife breastfeeds an infant? And will the infant's wife be prohibited to her maternal uncle? And is it permissible for her to remove her hijab in front of him? And are the maternal uncle's wife's sisters prohibited to the infant?

Does one suckling prohibit if the aunt suckles her sister's daughter with her young son, and is it a condition to complete five sucklings within two years for the prohibition?

What is the ruling on the marriage of the son of "S" to the daughter of "P" after the daughter of "P" was breastfed by one of the children of the second wife, and what is the fate of their children?

Is it permissible to marry one's maternal aunt's daughter after the mother nursed the maternal aunt's daughter, and the maternal aunt nursed two of the questioner's siblings, without specifying the number of nursings, and does the ruling of fosterage cease if the number is not specified?