Ad legem Iuliam et Papiam libri
Ex libro V
Ulpianus, On the Lex Julia et Papia, Book V. If I should swear in court that I am the patron of a certain slave, it must be held that I am not entitled to his estate in that capacity, because an oath does not constitute a patron. The case would, however, be different, if it had been judicially decided that I was his patron, for then the judgment will stand.
Ulpianus, On the Lex Julia et Papia, Book V. Labeo says that the wife of my grandson, the son of my daughter, is my granddaughter. 1Persons who are betrothed are included in the terms son-in-law and daughter-in-law, likewise the parents of such persons are considered to be included in the terms father-in-law and mother-in-law.
The Same, On the Lex Julia et Papia, Book V. It is evident that, under the term “son-in-law” are included the husbands of granddaughters, and great-granddaughters, and their descendants; whether they are the offspring of a son or a daughter.