The Heidelberg book says McClammey H'berg, b c1787, is son of John Christian H'berg, Jr., b c1750, who was son of John Christian H'berg, b c1727, and Catharine McClammey. In other words, he was grandson of JCH and C. McClammey. I have no info about wife of JCH, Jr. or McC H'berg.
I find only one Mary Elizabeth H'berg in book. She was dau of Samuel Christian H'berg and Martha Granberry. She was b Apr 10 1851 in Clark Co., Mississippi. She married Epaminondus Jenkins on Nov 12 1874.