مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٥٩٢ - INHERITANCE OF THE THIRD GROUP

grandfather inherits ١/٣ of the property. And in this case if the dead person has a son of the maternal brother as well, the brothers son joins the maternal grandfather in the ١/٣ of the property.

INHERITANCE OF THE THIRD GROUP
٢٧٦٥. The third group of heirs consists of paternal uncle, paternal aunt, maternal uncle, maternal aunt and their children. As mentioned above, the personsconstituting this group inherit the property when none of the persons belonging to the first two groups is present.
٢٧٦٦. If the only heir of a dead person is one paternal uncle or aunt (whether he or she be the real, paternal or maternal brother or sister of his father), he orshe inherits the entire property. And if there are some paternal uncles or aunts of the dead person and all of them are the real or paternal brothers and sisters of hisfather, the property is divided equally among them. And if there are some paternal uncles and aunts of the dead person and all of them are the real or the paternal brothersand sisters of his father, the well-known view is that the paternal uncle gets twice the share of the paternal aunt. For example, if two paternal uncles and one paternal auntare the heirs of the dead person, the property will be divided into ٥ parts, out of which the paternal aunt will get one part and the two paternal uncles will divide theremaining ٤ parts equally between them. However, it is not unlikely that the property may be divided equally between them (i.e. between the paternal uncles and the paternalaunt).
٢٧٦٧. If the heirs of a dead person are some maternal uncles or some maternal aunts or one maternal uncle and one maternal aunt, the apparent view is that theproperty will be divided equally among them.
٢٧٦٨. If the heirs of a dead person are his paternal uncles and