Mason J. Haas, 17, of Sellersville, died Wednesday, March 29th at his home. Born in Sellersville, he was a son of Russell Haas of Sellersville and Jamie (Kline) Haas of Quakertown. He was an eleventh grade student at Dock Mennonite Academy, Lansdale and worked at Panera Bread in Quakertown. He attended Swamp Mennonite Church, Quakertown. In addition to his parents, he is survived by his brother, Michael Haas of Coopersburg; sisters, Elizabeth Haas, Emma Haas, and Sarah Haas, all of Sellersville; paternal grandparents, Fred and Carol Haas of Perkasie; and maternal grandparents, Charles and Cheryl Kline of Quakertown. A memorial service will be held at 4:00 PM, Saturday, April 8th at Calvary Church, 820 PA 113, Souderton with a luncheon to follow. Memorial contributions can be made to the Youth Program and the Mennonite Education Plan for Tuition Assistance at Swamp Mennonite Church, 2125 Rosedale Rd., Quakertown, PA 18951.