Rafael Domingo, Emory School of Law and University of Navarra, has published The Family in Ancient Roman Law. Here is the abstract.
The family constituted the basic structural framework of Roman society. The Latin term familia means, essentially, household. It can refer to both persons and things It encompasses all persons who are under the power of a single head (the paterfamilias), and, in a broader sense, all relatives connected by blood or marriage. In a still broader sense, the Roman family encompassed all personal property, including slaves and physical objects. Social stratification, sexual inequality, and legal subordination were defining features of the Roman family.Download the article from SSRN at the link.