Oliver

Oliver is a medieval French and Latin name whose precise origin is debated. It may derive from the Old Norse name Áleifr (meaning "ancestor's descendant," the same source as Olaf), altered by association with the Latin word oliva, meaning olive tree. The name gained wide currency through the medieval French epic La Chanson de Roland, in which Oliver is one of Charlemagne's most celebrated knights and the loyal companion of the hero Roland. Notable historical bearers include the English military leader Oliver Cromwell, and related forms across Europe include Olivier, Olivér, and Óliver.