Sergiu is a Romanian given name, equivalent to the English Sergius. The name ultimately derives from the Roman family name Sergius, which is likely of Etruscan origin. Its meaning is debated: it may mean "servant" in Latin, but this is uncertain. The name gained popularity through early Christian saints. One notable figure is Saint Sergius, a 4th-century Roman officer martyred in Syria with his companion Bacchus; they are venerated as patron saints of Christian desert nomads. In the Orthodox tradition, the name is associated with Saint Sergius of Radonezh (14th-century Russian spiritual leader), whose name in Russian appears as Sergey. The name was also borne by four popes and appears briefly in the New Testament, referring to Sergius Paulus, a Roman proconsul in Cyprus (Acts 13:7). Sergiu is a common masculine given name in Romania. Notable bearers include Romanian-born conductor Sergiu Celibidache, mathematician Sergiu Klainerman, and film director Sergiu Nicolaescu. Variants in other languages include Sargis (Armenian), Siarhei (Belarusian), andSergo (Georgian). Etymology The name Sergiu is a Romanian language form of the Latin Sergius. The Sergii were a prominent Roman family of possibly Etruscan origin, and the root Serg- may be connected to the Latin verb servire (to serve). The Christian use of the name honors early martyrs. Notable Bearers Sergiu Celibidache (1912–1996) – Romanian conductor known for his interpretive style. Sergiu Nicolaescu (1930–2013) – Romanian film director, actor, and politician. Sergiu Klainerman (born 1953) – Romanian-born American mathematician. Sergiu Dan (1903–1975) – Romanian writer and journalist. Sergiu P. Pașca (born 1981) – Romanian-American neuroscientist. Variant Forms Besides Sergiu, the root name appears in many languages: Russian Сергей (Sergey), Italian Sergio, Spanish Sergio, French Sergueï, and others. Meaning: Possibly "servant" (Latin); of Etruscan origin. Origin: Romanian form of Latin Sergius. Type: Given name. Usage: Primarily Romanian.