In Latin, most nomina were formed by adding an adjectival suffix, usually -ius, to the stem of an existing word or name. Frequently this required a joining element, such as -e-, -id-, -il-, or -on-. Many common nomina arose as patronymic surnames; for instance, the nomen Marcius was derived from the praenomen Marcus, and originally signified Marci filius, "son of Marcus". In the same way, Sextius, Publilius, and Lucilius arose from the praenomina Sextus, Publius, and Lucius. This demonstrates that, much like later European surnames, the earliest nomina were not necessarily hereditary, but might be adopted and discarded at will, and changed from one generation to the next. The practice from which these patronymics arose also gave rise to the filiation, which in later times, once the nomen had become fixed, nearly always followed the nomen. Other nomina were derived from names that later came to be regarded as cognomina, such as Plancius from Plancus or Flavius from Flavus; or from place-names, such as Norbanus from Norba. The binomial name consisting of praenomen and nomen eventually spread throughout Italy. Nomina from different languages and regions often have distinctive characteristics; Latin nomina tended to end in -ius, -us, -aius, -eius, -eus, or -aeus, while Oscan names frequently ended in -is or -iis; Umbrian names in -as, -anas, -enas, or -inas, and Etruscan names in -arna, -erna, -ena, -enna, -ina, or -inna. Oscan and Umbrian forms tend to be found in inscriptions; in Roman literature these names are often Latinized. Many individuals added an additional surname, or cognomen, which helped to distinguish between members of larger families. Originally these were simply personal names, which might be derived from a person's physical features, personal qualities, occupation, place of origin, or even an object with which a person was associated. Some cognomina were derived from the circumstance of a person's adoption from one family into another, or were derived from foreign names, such as when a freedman received a Roman praenomen and nomen. Other cognomina commemorated important events associated with a person; a battle in which a man had fought (Regillensis), a town captured (Coriolanus); or a miraculous occurrence (Corvus). The late grammarians distinguished certain cognomina as agnomina. Although originally a personal name, the cognomen frequently became hereditary, especially in large families, or gentes, in which they served to identify distinct branches, known as stirpes. Some Romans had more than one cognomen, and in