John A. Lekavich, age 77, late of Palos Hills.  Loving brother of Bernadette Panovich, Antoinette (Joe) Sibrava, and the late Ronald J. (Barbara) Lekavich. Dear uncle of Helen and John Lekavich, Cari (Michael) Matykiewicz, and great uncle to their children Myka, Brin, Cali, and Mae. Fun-loving uncle of Jill (Brian) Snell and great uncle to their children Hayden and Kylie.  Kind uncle of Eric and Elizabeth Sibrava (Justin Ott) and great uncle to their children Caroline and Joey. President and owner of IntraAction Corporation in Bellwood. John was a remarkable man and technician. He made a difference in the lives of many people throughout the world, due to his excellent and outstanding expertise in the field of Acousto Optics. He was a former member of the Nomad Ski Club in Oak Lawn. He will be remembered for his selflessness and generosity. Visitation Sunday 3:00 to 8:00 p.m. Funeral Monday 9:45 a.m. from Thornridge Funeral Home (Janusz Family Funeral Service), 14318 S. LaGrange Rd. (Northbound U-turn permitted at 143rd St) Orland Park to Sacred Heart Church Mass 10:30 a.m. Interment Good Shepherd Cemetery. In lieu of flowers, memorials may be directed to the American Cancer Society. https://donate3.cancer.org/?campaign=default&lang=en%20