William Everdell, a longtime resident of Old Brookville, Long Island, N.Y., died on Friday, Sept. 3 in Glen Cove Hospital. The eldest son of William and Rosalind Romeyn Everdell, he was 95.

For nearly 60 years he was a summer resident of Edgartown. He was married for 67 years to Eleanore Darling, who died in 2008 and was the daughter of C. Coburn and Marian P. Darling, also summer residents of Edgartown. They had also lived in the villages of Plandome and Muttontown on Long Island and in Queenstown, Md. Bill, a graduate of Allen-Stevenson School, Saint Paul’s School in Concord, N.H., Williams College (1937) and Yale Law School (1940), joined the law firm of Debevoise and Plimpton in New York city as lawyer number six in 1940.

He joined the U.S. Naval Reserve soon after Pearl Harbor, and earned seven battle stars, largely in the Pacific, before being mustered out as lieutenant commander in 1945 and rejoining Debevoise and Plimpton. He retired from the practice of law in 1988, having been a partner at Debevoise from 1949 to 1985. He had been a fellow of the American Bar Foundation, a member of the American Bar Association, a member of the Association of the Bar of the City of New York (serving on its executive committee from 1960 to 1964), and a member of the New York State Bar Association (serving as chairman of its committee on corporate law from 1971 to 1973). He was a trustee of Saint Paul’s School from 1978 to 1986 and member of the executive committee of the Woods Hole Oceanographic Institution, as well as a trustee and member from 1987 to 1993 of the executive committee of the Cold Spring Harbor Laboratory. He was a member of the Pilgrim Society, the Piping Rock Club and the Links Club in New York. A devoted sailor, he had also been a longtime member of the Edgartown Yacht Club, the Edgartown Golf Club and the Edgartown Reading Room.

He is survived by three children, William R. of Brooklyn, Coburn D. of San Francisco, and Preston of Centreville, Md.; three daughters in law, Barbara S., Elizabeth (Betsy) E., and Sarah J.; six grandchildren, Josh, Chris, Cobie, Ellie, Abby and Nick; and three great-grandchildren, Will, Murphy and Lily. Another grandchild, Molly, predeceased him.

There will be a memorial service at Saint John’s Episcopal Church in Cold Spring Harbor, L.I., N.Y. at 11 a.m. on Sept. 25. In lieu of flowers, donations may be made to Saint Paul’s School.