From the French form of the emperor's name, meaning 'Charles the Great,' from Germanic Karl plus 'great.'
Few names carry the sheer historical gravity of Charlemagne — a name that is, in essence, a title: Carolus Magnus in Latin, Karl der Große in German, "Charles the Great." It emerged as the historical epithet for the Frankish king and Holy Roman Emperor (748–814) who unified much of Western Europe under a single Christian crown for the first time since the fall of Rome. The name Charlemagne as a given name is therefore extraordinary — to use it is to invoke one of history's most consequential figures, the man who standardized weights and measures, reformed the church, promoted literacy through the Carolingian Renaissance, and is considered a founding father of both France and Germany.
In medieval Europe, Charlemagne became the center of a vast literary mythology — the chansons de geste celebrated him and his twelve paladins in epic cycles akin to the Arthurian legends. Works like La Chanson de Roland immortalized his court at Aachen as a seat of Christian chivalry and martial virtue. Dante placed him in Paradise.
He was canonized (informally) by an antipope, and his lineage was claimed by virtually every European royal house. The name thus accumulated centuries of mythic weight quite apart from the historical man. As a modern given name, Charlemagne is vanishingly rare and deliberately audacious — a choice that announces itself with unmistakable confidence.
It appears occasionally in communities that prize grand historical names, and has seen some small revival interest as maximalist naming trends (Atticus, Leonidas, Octavia) gain traction. A child named Charlemagne carries with them the entire arc of Western medieval civilization — a name that is less a label than a monument.