How is the inheritance of a deceased father divided among his sons, daughters, and wife, given the presence of a son who died during his lifetime and who has children, and the presence of children who do not embrace Islam? And what is the ruling on his will to divide the inheritance among all of them?

The questioner's brothers who converted to Christianity are apostates because they were originally Muslims, following their father's Islam. An apostate does not inherit from their Muslim parent. A grandson does not inherit when there is a son. The deceased's will is executed from one-third of the estate, unless the adult, competent heirs approve more than one-third. If all adult, competent heirs approve the will, then all beneficiaries inherit; otherwise, the will is executed from one-third only, and it is divided among the converted sons and daughters and the grandson and granddaughter, with the male receiving a share equal to that of the female. The inheritance is divided as follows: if there is a wife, she takes one-eighth, and the remainder is divided among the Muslim sons and daughters, with the male receiving a share equal to that of two females, unless one of the deceased's parents is alive, in which case they take one-sixth. The questioner is advised to invite his brothers to Islam. Finally, matters of inheritance are complex and should not be divided without consulting the Sharia courts.