[MODESTINUS libro secundo regularum. ] §1.7.1.prFilios familias non solum natura, uerum et adoptiones faciunt.
[MODESTINUS in the second book of Rules.] Not only nature, but also adoptions make sons-in-power.
§1.7.1.1Quod adoptionis nomen est quidem generale, in duas autem species diuiditur, quarum altera adoptio similiter dicitur, altera adrogatio.
This term "adoption" is indeed general, but it is divided into two species, of which one is likewise called adoption, and the other adrogation.
adoptantur filii familias, adrogantur qui sui iuris sunt.
Sons-in-power are adopted; those who are sui iuris are adrogated.