The gens Opsilia was an obscure plebeian family at Rome. No members of this gens are known to have held any magistracies, but several are found in inscriptions.
Origin
The nomen Opsilius belongs to a class of gentilicia formed from other names using the suffix -ilius. In this case the nomen is derived from the more common Opsius; the same nomen also gives rise to the gens Opsidia or Obsidia. The common root of all three nomina is op-, "help", found in the name of the goddess Ops, as well as the praenomenOpiter, and the derived patronymics Opiternius and Opetreius, and the nomen Oppius. Most of these names are thought to be of Sabine or Samnite origin.
Members
This list includes abbreviated praenomina. For an explanation of this practice, see filiation.
René Cagnat et alii, L'Année épigraphique (The Year in Epigraphy, abbreviated AE), Presses Universitaires de France (1888–present).
The Roman Inscriptions of Britain (abbreviated RIB), Oxford, (1990–present).
Andreas Kakoschke, Ortsfremde in den römischen Provinzen Germania inferior und Germania superior (Foreigners in the Roman Provinces of Germania Inferior and Germania Superior), Möhnesee (2002).
Antonio M. Corda, Concordanze delle iscrizioni latine della Sardegna (Concordance of the Latin Inscriptions of Sardinia, abbreviated SRD), Ortacesus (2014).