Jonathan S. Kletnick passed away on December 6, 2020 due to complication of Covid-19 resident of Tinley Park, IL. Beloved husband of Susan M. Kletnick nee George; loving father of Andy ( Katy) and Tom ( Ashley) Kletnick; cherished grandfather of Makena, Damien, Aaron and Reina; dearest brother of Harold, Eileen, Tova (Zachary) and Ruth (Marie) Kletnick; dearest uncle of many nieces and nephews. A private graveside service will be held on Thursday, December 10, 2020 at Pleasant Hill Cemtery, Frankfort, IL In lieu of flowers, contributions to the Brain & Behavior Research Foundation 747 Third Avenue, 33rd Floor New York, NY 10017 or visit https://www.bbrfoundation.org would be appreciated Services Graveside Service Thursday December 10, 2020 11:30 AM Pleasant Hill Cemtery, Frankfort