William R. Knoll, 75, of Irwin died Wednesday December 1, 2021 at his home. He was born June 6, 1946, in McKeesport a son of the late Louis and Edna (Sager) Knoll. He was employed as a bus monitor for First Student. Surviving is a son William L. Knoll and his wife, Jennifer, of Twinsburg, OH.; two grandchildren Alexander and Nathaniel. Friends will be received Saturday 9:30 a.m. to 11:30 a.m. at the Ott Funeral Home Inc 805 Pennsylvania Avenue Irwin. Interment will be private.