Which of Hemingway's sons became a physician?

Hemingway’s son who became a physician was Gregory Hemingway.

Born in 1931, Gregory was Ernest Hemingway’s third and youngest child with his second wife, Pauline Pfeiffer. He studied at the University of Miami Medical School and earned an MD in 1964, later practicing medicine in New York and Montana.

Gregory’s life extended well beyond his famous father’s literary world. He worked as a rural family doctor and served as a medical officer in Garfield County, Montana. He was also a writer, publishing the memoir Papa: A Personal Memoir in 1976, which described his complicated relationship with Ernest.

Readers may encounter Gregory’s later name, Gloria Hemingway, in updated references. Gregory publicly lived for much of his life as a man and later underwent gender-transition surgery, preferring the name Gloria when possible. The other options are relatives or members of the Hemingway family, but Gregory is the son specifically identified with a medical career.