Lucius is a male given name derived from Lucius, one of the small group of common Latin forenames (praenomina) found in the culture of ancient Rome. Lucius derives from Latin word Lux, meaning "light", and is a cognate of the name Lucas. Another etymology proposed is a derivation from Etruscan Lauchum meaning "king", which however was transferred into Latin as Lucumo. Lucy is the feminine derivative of the name.
