Kelly M. Kowalczyk, 37, of Bradford Road, died suddenly Saturday morning at Ellis Hospital, after suffering a massive heart attack. Kelly was born in Schenectady on August 17, 1971, the daughter of John and Nancy Sarnowski Kowalczyk. She was a graduate of Niskayuna High School, class of 1989. She was a manager for the elderly at Schenectady Municipal Housing Authority for many years. Kelly enjoyed life and had a great love for all animals, especially dolphins. Kelly is survived by her precious daughter, Samantha, whom she loved and adored; her devoted parents, John and Nancy Kowalczyk; her loving sister, Suzanne Gray and her husband, Christopher, of Glenville; her nephew, Evan Hoy, who she had a special love for; nephews, Tyler and Anthony Gray and Ray Pecci; niece of Joseph Sarnowski, of Schenectady, Patricia Kowalczyk, of Albany and Barbara Sarnowski, of Florida; sister-in-law of Matthew Hoy and her dear friends Brian and Matt.