بسم الله الرحمن الرحيم
(Fatwa: 479/400/B=4/1439)
Marrying in such family is avoidable and not preferable. Those who are nourished with haram wealth usually they are not good in respect to instinct and morals. Hence it should be avoided. One should find out a match in some pious family.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband

