Rus is a Romanian surname derived from the Romanian word rus, meaning "Russian." This name reflects historical and cultural connections between Romania and its Slavic neighbors to the north and east, particularly through trade, migration, and political influence.EtymologyThe surname originates from the ethnonym Rus, which historically referred to the East Slavic peoples and, later, to the Russian Empire. The word itself traces back to the name of the Varangians—Scandinavian Vikings who founded the medieval state of Kievan Rus' in the 10th century, according to linguistic and historical studies (see Names of Rus', Russia and Ruthenia). Over time, the term came to denote both the polity and its inhabitants, ultimately evolving into the modern names Russia and Ruthenia.Historical ContextIn Romanian, the label rus (plural ruși) specifically denoted a person from Russia or an ethnic Russian. Surnames derived from ethnic origins were common across many cultures, often bestowed based on a bearer's origin or perceived ethnicity. In the case of Rus, it may have been used to identify individuals or families who had migrated from territories of the former Kievan Rus' or the Tsardom of Russia into the Romanian-speaking principalities of Moldavia and Wallachia. This is especially plausible given the historical presence of Russian merchants, refugees, and soldiers in the region from the Middle Ages onward.Variants and Related FormsThe most prominent variant of this surname is Rusu, a common Romanian surname that shares the same etymology. Other related names across Eastern Europe include the Russnak (Polish variant) and Rusiâ (simplified spelling of a related root). These forms illustrate the widespread influence and adaptation of the root rus in various Slavic and non-Slavic languages.Meaning: "Russian"Origin: Romanian, from Byzantine/Slavic influencesType: Ethnic/surnameUsage Region: Romania, Moldova; also found among Romanian diaspora