Marrying the stepmother's granddaughter

Q: A man named Jazza` married a widow who had a son called `Abdullah. She bore him boys and girls and then she passed away. Jazza` married another woman who bore him boys and girls as well. Is it permissible for one of Jazza`s sons from the second wife to marry any of the girls of `Abdullah's daughters? It should be taken into consideration that he does not know whether `Abdullah was suckled by his mother when she married him or not even though she married him (Part No. 18; Page No. 373) three years after the death of her husband.Please advise us. May Allah grant you the best reward.

A: If the matter is as you have described, it is permissible for any of Jazza`s sons to marry any of `Abdullah's daughters as nothing prevents their marriage. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.