Olga Lang Hertz (nee Seidenfeld) a Holocaust Survivor, beloved wife of the late Harold J. Hertz MD. and Albert Lang. Devoted mother of Tom Lang and Susie (Sam ) Lang Shvartz. Adored grandmother of Ariella Shvartz and Orli (Oshri) Perez and cherished great grandmother of Liav and Niv. Services will be held Sunday, April 7 at 3 P.M. at the BERKOWITZ-KUMIN-BOOKATZ MEMORIAL CHAPEL, 1985 S. Taylor Rd., Cleveland Heights, OH. Interment Mt. Olive Cemetery. Family will observe Shiva at the residence of Sam & Susan Shvartz, 24400 Union Circle, Beachwood, OH SUNDAY FOLLOWING SERVICES UNTIL 9 P.M.,MONDAY, TUESDAY, WEDNESDAY & THURSDAY 1-9 P.M. (Minyan services at 8 P.M.). Friends who wish may contribute to the American Heart Association or Magen David Adom.