Nomenclature
The Turkish name Çanakkale Boğazı is derived from the major city adjoining the strait, Çanakkale (which takes its name from its famous castles; kale means "castle").
The name Dardanelles derives from Dardania, an ancient land on the Asian shore of the strait which in turn takes its name from Dardanus, the mythical son of Zeus and Electra.
The Greek name Ἑλλήσποντος (Hellespontos) means “Sea of Helle”, and was the ancient name of the narrow strait. It was variously named in classical literature Hellespontium Pelagus, Rectum Hellesponticum, and Fretum Hellesponticum. It was so called from Helle, the daughter of Athamas, who was drowned here in the mythology of the Golden Fleece.
Read more about this topic: Dardanelles