What is the share of the deceased woman's grandchildren and the sons of her brother who died before her from the inheritance?

If the deceased has no relatives other than those mentioned, then the heirs are the male nephews only, excluding the nieces or the children of the daughters. This is because nieces and children of daughters are considered 'dhawu al-arham' (relatives by blood, but not primary heirs) and do not inherit when there are 'asabah' (agnatic heirs). The inheritance is to be divided among the male nephews according to their number. They should give a portion of it to their relatives who did not inherit, in accordance with the noble verse: "And when [other] relatives and orphans and the needy are present at the time of division, then provide for them [something] out of it and speak to them words of kindness." Inheritance matters must be referred to the Sharia (definition) courts to ascertain the presence of any other heirs, wills, or debts.