Is it permissible to marry the daughter of my paternal cousin, knowing that my paternal grandmother breastfed both me and my paternal cousin, such that my paternal cousin is my sister through breastfeeding?
Source: FtawySummary from Ftawy's records · added here Sep 2, 2026
The daughter of a foster sister is forbidden (for marriage) just as the daughter of a blood sister is forbidden, due to the Prophet's (peace and blessings be upon him) saying: "What is forbidden by lineage is forbidden by fosterage." Therefore, if your paternal cousin is your foster sister, then it is not permissible for you to marry her daughter.
Summary from Ftawy's records · added here
Reviewed by El Fatwa's sharia committee.
Read the full answer on Ftawyhttps://ftawy.com/en/questions/138010
Where this answer came from
- Source platform
- Ftawy
- Original fatwa ID
- 138010
- Added here
- . This is when the answer was added to El Fatwa, not the fatwa's date.
- Text
- Summary from Ftawy's records, reviewed by El Fatwa's sharia committee.
- Read the full ruling
- Read the full answer on Ftawy