Sean Cabot Williams, age 20 of Thornton, PA passed away suddenly while attending school at the University of Lynchburg. Born in West Chester, PA, Sean has been a lifelong Thornton resident. Sean graduated from Garnet Valley High School, Class of 2018 and was an avid snowboarder, skateboarder and loved mixing and listening to music. During his time at the University of Lynchburg, he was a brother of the Phi Kappa Tau Fraternity where he was actively involved in all aspects of fraternity life. Sean leaves behind his beloved parents, Cabot and Jackie Annelli Williams, a sister, Alexandra Williams, maternal grandparents, Dennis and Sue Annelli, his paternal grandmother, Ann Cabot Williams, aunts and uncles, Edward (Elaine) Annelli, Jennifer (Robbie) Howard, Johnny (Jayne) Williams and Molly Williams, close friends, Lisa and Shawn Lawler as well as cousins and close friends. A visitation will be held on Tuesday, May 25, from 9:15am to 11:30am at St. Thomas the Apostle Catholic Church (New Church), 430 Valleybrook Rd., Glen Mills, PA followed by a Mass of Christian Burial at 11:30am. Burial will remain private. In lieu of flowers, donations in Sean's memory may be made to the Children's Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104. Online condolences may be made by visiting www.paganofuneralhome.com.