Bob (Robert) Carlton McWilliams passed away on Friday, June 14, 2019. Born in Tucson to the late Marjorie Ann and Bob Blaser McWilliams, Bob is survived by his sisters Julie Kay McWilliams and Robin Sue McWilliams, niece Penny (Penelope) Kay Litten, nephew Andy (James Andrew) Litten, great-nephew Ledger Matthew Litten and many dear friends near and far. Bob graduated from Santa Rita High School and the University of Arizona Business School. His work led him to Flagstaff, Pasadena and Hawaii before returning to Tucson where he resided the last two years. A private celebration of life will be held at a later date.