John Arnold de Sousa Sr., an Air Force veteran, retired plumbing contractor from Montauk, and former member of the East Hampton Republican Committee, died on Dec. 2. He was 85.

Betty L. Cobb, an 11th-generation native of East Hampton, died on Dec. 4 at the Springs house of her daughter, Diane Goncalves, following a lengthy illness. She was 89.

Mary Margaret Hostetter Sherrill, an artist and preservationist who was descended from a long-established East Hampton family, died on Oct. 14 at her home in Mount Pleasant, S.C., surrounded by family, of metastatic lung cancer.