Bun died April 3, 2015, in Lexington, Va., with his wife at his side.
He prepared at Lawrenceville. At Princeton he was in the band, won 129 boxing matches, and majored in biology. Bun received a medical degree from Columbia in 1947 and spent three years at Kings County Hospital in Brooklyn. He then spent three years as a captain in the Air Force, where he cared for dependents at Westover Air Base.
Bun married Phylliss Hopkins in 1946 and they had two children before Phylliss died of polio in 1952. For many years, Bun was a partner and pediatrician with the Summit Medical Group in New Jersey. He married Ruth Clark in 1955, and they had two children. He and Ruth had a summer home on Fire Island, N.Y., and they sang in the Presbyterian Church there and in Florida. Together they enjoyed music and travel. Bun was active in the local YMCA.
He retired in 1986 and joined his wife in a joint practice of psychoanalysis. Bun authored a journal on the psychoanalytic study of the child.
He is survived by Ruth; his children, Ramsey and Anne; their children, Jon and Susan; nine grandchildren; and four great-grandchildren.