The Servilii were divided into numerous families; of these the names in the Republican period are Ahala, Axilla, Caepio, Casca, Geminus, Glaucia, Globulus, Priscus (with the agnomen Fidenas), Rullus, Structus, Tucca, and Vatia (with the agnomen Isauricus). The Structi, Prisci, Ahalae, and Caepiones were patricians; the Gemini originally patrician, and later plebeian; the Vatiae and Cascae plebeians. Other cognomina appear under the Empire. The only surnames found on coins are those of Ahala, Caepio, Casca, and Rullus.Joseph Hilarius Eckhel, Doctrina Numorum Veterum, v. p. 308 ff.
