doll: [16] Doll comes from the name Dorothy: the changing of r to l in personal names is a common English phenomenon of long standing, from Shakespeare’s Prince Hal (for Harry) to the currently familiar Del and Tel (for Derek and Terry). The word was originally applied to a man’s mistress (much like moll, which came from Mary), but in the 18th century it came to be applied to a ‘toy baby’. The pet form dolly dates from the 17th century. [doll etymology, doll origin, 英语词源]