We, however, have determined to follow a straightforward and simple path, and, preferring the mother to all other persons with a statutory title, to give her the entire succession of her sons, without deduction in favour of any other persons except a brother or sister, whether by the same father as the deceased, or possessing rights of cognation only; so that, as we have preferred the mother to all with a statutory title, so we call to the inheritance, along with her, all brothers and sisters of the deceased, whether statutorily entitled or not: provided that, if the only surviving relatives of the deceased are sisters, agnatic or cognatic, and a mother, the latter shall have onehalf, and all the sisters together the other half of the inheritance; if a mother and a brother or brothers, with or without sisters agnatic or cognatic, the inheritance shall be divided among mother, brothers, and sisters in equal portions.
"The Institutes of Justinian"
Caesar Flavius Justinian
5 In this place too we should observe that a person who claims as an agnate can be admitted to the inheritance, even though ten degrees removed from the deceased, both by the statute of the Twelve Tables, and by the Edict in which the praetor promises the possession of goods to heirs statutorily entitled: but on the ground of mere natural kinship the praetor promises possession of goods to those cognates only who are within the sixth degree; the only persons in the seventh degree whom he admits as cognates being the children of a second cousin of the deceased.
"The Institutes of Justinian"
Caesar Flavius Justinian