William Gilmor Costin III, known to all as Gil, died December 21 at the age of 59. He was born September 13, 1944, the oldest of four sons of William Gilmor Costin, Jr. and Phyllis Huhn Costin. He graduated from Tabor Academy in Marion, Massachusetts in 1963, the University of Pennsylvania in 1967, and received a Master’s of Business Administration from New York University in 1981. Costin grew up in New York City and had lived with his wife and children in Pacific Palisades for the past 19 years. At the time of his death, he was employed by the Fraser Financial Group of Los Angeles. He was an active member of The Parish of St. Matthew, where he taught Sunday school for many years and served on the Stewardship and Planned Giving committees. He had a life-long interest in sports, excelling in lacrosse, ice hockey, football and tennis during his school years. He coached AYSO soccer in the Palisades for many years. He was very active in fundraising and in running golf tournaments for his children’s schools, John Thomas Dye, St. Matthew’s, Palisades High, and Marlborough. Costin is survived by his wife of 28 years, Anne King Costin; his four children, William Gilmor Costin IV, Wendy Costin Wolcott, Kingsley Blackridge Costin, and Whitney McKelvy Costin; his grandchildren, McKelvy Brackenridge Costin, Catherine Reed Costin, William Blackburne Costin and Oliver Whitney Wolcott; brothers, Blackburne Costin and Brackenridge Costin; and his stepmother, Jean Whitney Gold. He was predeceased by his brother, McKelvy. A memorial service will be held at St. Matthew’s, 1031 Bienveneda, on Saturday, January 3, at 11 a.m. A reception will be held at the parish immediately following the service. Burial will follow at 11 a.m. on Tuesday, January 6 at Emmanuel Episcopal Church in Middleburg, Virginia. Memorials can be made to The American Liver Foundation, Greater Los Angeles Chapter, Funds for the Cure-Hepatitis C (liverfoundation.org) or to a charity of one’s choice.
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