List of Famous people named John

John Dopyera was a Slovak-American inventor and entrepreneur, and a maker of stringed instruments. His inventions include the resonator guitar and important contributions in the early development of the electric guitar.

John Randolph Bray was an American animator, cartoonist, and film producer.

John Romulus Brinkley was an American quack who fraudulently claimed to be a medical doctor. He had no properly accredited education as a physician and bought his medical degree from a "diploma mill". Brinkley became known as the "goat-gland doctor" after he achieved national fame, international notoriety and great wealth through the xenotransplantation of goat testicles into humans. Although initially Brinkley promoted this procedure as a means of curing male impotence, eventually he claimed that the technique was a virtual panacea for a wide range of male ailments. He operated clinics and hospitals in several states, and despite the fact that almost from the beginning, detractors and critics in the medical community thoroughly discredited his methods, he was able to continue his activities for almost two decades.