Rus may come from the early Slavic ethnonym Rus or as a short form of Russell, meaning "red-haired" in later use.
Rus is at once one of the oldest and least-used given names in the European tradition, freighted with the weight of an entire civilisation's origins. The Rus' — the people from whom Russia, Belarus, and Ukraine all derive their names — were a group of Varangian (Norse) traders and warriors who established a network of principalities along the great rivers of Eastern Europe in the ninth century, with Kyiv as their most glorious capital. The name's precise origin is debated: some scholars connect it to the Old Norse *róðs-* ('rowing,' 'seafaring'), others to Finnish *ruotsi* (a word for Sweden), and others still to Slavic roots.
Whatever its etymology, Rus carries the memory of a world-making moment. As a given name, Rus functions most naturally as either a short form of Russell — from the Norman French *roux*, meaning red-haired — or as a standalone name drawing on that Varangian heritage. Russell as a surname became a given name in the nineteenth century, common in the English-speaking world and associated with the Russell family, one of England's great aristocratic dynasties.
Rus strips that legacy to its bare, monosyllabic core, giving it an abrupt, almost rune-like force. In contemporary use, Rus is vanishingly rare as a given name, which gives it a quietly radical quality. It sounds ancient and modern simultaneously — one syllable, no ornamentation, carrying the sonic DNA of an entire geographic and cultural tradition. For a child growing up between Eastern European and Anglophone worlds, or for parents who want a name that is genuinely uncommon while being etymologically profound, Rus offers something few names can: the weight of history in a single breath.