John Putnam Merrill (March 10, 1917 – April 14, 1984) was an American physician and medical researcher.

With his excellent medical background ... four years as a flight surgeon ... interest in cardiorenal disease ... and the intellectual curiosity that characterizes a born researcher ... he was ideally suited.In 1950, Merrill began teaching at Harvard Medical School.

[1] In 1954, Merrill headed the multidisciplinary team that performed the first successful transplant of a kidney between identical twin brothers.

[4] Merrill's career was cut short when he died on April 14, 1984, in a boating accident while vacationing in the Bahamas.

[1] In a statistical overview derived from writings by and about John Merrill, OCLC/WorldCat encompasses roughly 20+ works in 30+ publications in 3 languages and 400+ library holdings .