The name "Beefeater" is believed to have originated in the 16th century when members of the Yeoman Warders were entitled to a daily ration of meat, including beef. This was a privilege granted to them in recognition of their important role in guarding the Tower. The term "beef" was used to refer to high-quality meat, and the Yeoman Warders were often referred to as "beef eaters" or "beefmen" in reference to this privilege.
The term "Beefeaters" gained popularity over time and became widely used as a colloquial name for the Yeoman Warders. However, the official designation remains Yeoman Warders, and they are primarily responsible for ceremonial duties and the care and maintenance of the historic Tower of London.