Cadin is a rare and distinct given name of French origin, derived from the Breton form Kadeyrn or Kadien, which themselves are derived from the Welsh name Cadwyn. Its roots lie in Celtic culture and history, with its meaning believed to be "battle" or "war," reflecting the fierce and powerful nature associated with Celts. Throughout history, figures such as King Cadwaladr of Gwynedd have borne this name, adding to its historical significance.