I believe Samuel Heckman is at Arlington but Susannah Witner Heckman is buried at St. John Lutheran, Hamburg, PA.From your data I found Mary Heckman died in Los Angeles 2 Dec 1960.She was born 15 Aug 1865 and was music teacher in Milwaukee and either widowed or divorced by 1900.One son, Reuhl (Royal?) Frederick Heckman died Orange Co. CA 8 Apr 1942.In 1930, shown as an artist with a wife Ruth b. ca. 1899 IN. Possible son named Wilson.A search of LA newspapers may provide further. Have difficulty confirming parents of these many John Henry Heckmans.