A modern spelling of Carly, from Karl or Carla, meaning free man.
Karly is a modern feminine variant of Carly, itself a diminutive of Carol or Caroline, all of which trace back to the Old High German name Karl. Karl derives from the Germanic root 'karal,' meaning a free man — specifically, in medieval usage, a man of the common people as opposed to a noble or a serf.
The name entered European royal tradition through Charlemagne (Carolus Magnus, 'Charles the Great'), the Frankish king who unified much of Western Europe in the ninth century and whose name became synonymous with kingship and authority across the continent. The feminine forms Carol and Caroline gained popularity in England and America during the eighteenth and nineteenth centuries, buoyed by royal bearers like Caroline of Ansbach, Queen consort of Great Britain. By the mid-twentieth century, the informal Carly had taken on a breezy, approachable quality — popularized by American singer-songwriter Carly Simon, whose career began in the early 1970s and whose name became associated with confident, expressive femininity.
The spelling Karly, with a 'K,' emerged as part of a broader late-twentieth-century trend toward individualized spellings that signal distinctiveness while keeping the phonetic familiarity intact. Today Karly is chosen by parents who want a name that feels both classic in its roots and contemporary in its presentation.