William Baylies (physician)

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William Baylies (1724–1787) was an 18th-century English physician. It is said that the King of Prussia, at an early interview with Baylies, remarked to him that "to have acquired such skill he must have killed a great many people", to which the doctor replied, "Pas tant que votre Majesté (Not as many as Your Majesty)".

Baylies died in Berlin on 2 March 1789 and left his library to the King of Prussia. A portrait of him by Johann Heinrich Schmidt, engraved by Daniel Berger, was published in Berlin.