Of Williamsville, NY passed away peacefully on September 5, 2025 at age 89. Beloved wife of Dr. William D.K. Clark Phd. Loving mother of Derek (Monica Bruno) Clark and Adrienne Whalen. Dear grandmother of Gabriel, Colin, Samantha and Lazuli. Sister of Don Thornton, Marilyn Bates and the late George and Bob Thornton and Rose McHallam. Also survived by many nieces and nephews. No prior visitation. A Funeral Service will be held at Calvary Episcopal Church, 20 Milton St. Williamsville, NY 14221 on Sunday October 5, 2025 at 1pm. Please assemble at church. In lieu of flowers memorials may be made to Calvary Episcopal Church in Kathleen's memory. Arrangements by DENGLER, ROBERTS, PERNA FUNERAL HOME.
