Roman naming convention

Over the course of some fourteen centuries, the Romans and other peoples of Italy employed a system of nomenclature that differed from that used by other cultures of Europe and the Mediterranean, consisting of a combination of personal and family names. Although conventionally referred to as the tria nomina, the combination of praenomen, nomen, and cognomen that have come to be regarded as the basic elements of the Roman name in fact represent a continuous process of development, from at least the seventh century BC to the end of the seventh century AD. The names developed as part of this system became a defining characteristic of Roman civilization, and although the system itself vanished during the early Middle Ages, the names themselves exerted a profound influence on the development of European naming practices, and many continue to survive in modern languages.

The distinguishing feature of Roman nomenclature was the use of both personal names and regular surnames. Throughout Europe and the Mediterranean, other ancient civilizations distinguished individuals through the use of single personal names, usually in nature. Consisting of two distinct elements, or "themes", these names allowed for hundreds or even thousands of possible combinations. But a markedly different system of nomenclature arose in Italy, where the personal name was joined by a hereditary surname. Over time, this system expanded to include additional names and designations.

The most important of these names was the nomen gentilicium, or simply nomen, a hereditary surname that identified a person as a member of a distinct gens. This was preceded by the praenomen, or "forename", a personal name that served to distinguish between the different members of a family. The origin of this binomial system is lost in prehistory, but it appears to have been established in Latium and Etruria by at least 650 BC. In written form, the nomen was usually followed by a filiation, indicating the personal name of an individual's father, and sometimes the name of the mother or other antecedents. Toward the end of the Roman Republic, this was followed by the name of a citizen's voting tribe. Lastly, these elements could be followed by additional surnames, or cognomina, which could be either personal or hereditary, or a combination of both.

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