Do grandchildren inherit from their grandfather after his death, knowing that their father had died before him?

A father who dies before his own father (the grandfather) does not inherit from him, because inheriting requires the heir to be alive after the deceased. As for grandchildren whose father died before their grandfather, if the grandfather has no living male children, the grandchildren inherit what remains of the grandfather's wealth after the اصحاب الفروض (those entitled to a fixed share), and it is divided such that the male receives the share of two females. If there are no اصحاب الفروض, they inherit all the wealth.

The matter of inheritances is serious and complex, and a mere fatwa is not sufficient. Rather, it must be referred to Sharia courts for investigation and to ensure there are no other heirs, wills, debts, or rights that take precedence over the heirs' right.