Do the deceased brother's daughters inherit from their deceased grandfather's estate?

If your brother died after your father, he has a share in your father's inheritance, which transfers to his heirs, including his daughters. As for your mother's inheritance, your brother or his daughters have no right to it as long as he died before her. The son's daughter does not inherit when a son exists; rather, your mother inherits from her deceased son, and then her right transfers to her heirs. We caution that inheritance matters are serious and complex and must be referred to Sharia courts or discussed directly with knowledgeable scholars to ensure justice and to enumerate the heirs, debts, and bequests.