William McNeill Whistler

William McNeill Whistler (July 22, 1836 – February 27, 1900) was an American physician and a medical army officer for the Confederacy during the American Civil War. He enrolled in Columbia College in 1853, but never graduated.

He enrolled as a pre-med student at Trinity College in Hartford, Connecticut in March 1855. He was the honorary physician to the National Training School of Music and a corresponding fellow of the American Laryngological Association. They did not have any children.

His brother James McNeill Whistler painted Whistler's portrait several times, including Portrait of Dr. William McNeill Whistler, Portrait of Dr. Whistler, No. 2, Portrait studies of the artist, his brother Dr. Whistler.

He died of influenza in 1900 at his home in London, England. He is buried at Hastings Cemetery and Crematorium, Hastings, East Sussex, England.