Can a boy marry with his uncle’s (real chacha and real mamu) daughter?
بسم الله الرحمن الرحيم
(Fatwa: 727/561/D=06/1435)
If there is no relation of fostering (i.e. they are not foster brother and sister) then it is lawful to marry the daughter of real chacha or mamu.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband