I have a nephew (my sister's son) who has a daughter. Is it permissible for me to marry his daughter from the viewpoint of Shari`ah?
Please give me an answer for this question. May Allah safeguard you.
(Part No. 11; Page No. 321
It is unlawful for you to marry the woman you referred to, because she is your nephew's daughter. Allah (Glorified be He) mentions in the Glorious Qur'an that this is among the women a man is forbidden to marry:
...your sister’s daughters
This applies to the daughters of a person's sister and the daughters of her children also.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.