Horace Evans, 1st Baron Evans GCVO (1 January 1903 – 26 October 1963) was a Welsh general physician known for serving the British royal family. The son of musician Harry Evans, Evans left his studies in music at age 18 years to pursue a career in medicine. With of the London Hospital Medical College, he worked on Bright's disease and on the relationship between nephritis (inflammation of the kidneys) and hypertension (high blood pressure). Evans was the personal physician to King George VI and conferred with Sir Clement Price Thomas during the king's illness and famous lung surgery in 1951.