The surname Caudebecq is of French origin, specifically toponymic, meaning it is derived from a place name. The name likely refers to locations named Caudebec, which are found in Normandy, France, such as Caudebec-en-Caux or Caudebec-lès-Elbeuf. The term itself comes from the Old Norse words kaldr (cold) and bekkr (stream or brook), reflecting the Viking influence in Normandy.