Johann Georg Heckmann was born on November 28, 1716 in Leibenstadt, Baden and died on March 5, 1780 in Sennfeld, Baden at the age of 63. He married Maria Clara Kramer on July 8, 1749 in Sennfeld, Baden. She was born on April 3, 1730 in Leibenstadt, Baden and died on April 26, 1808 in Sennfeld, Baden at the age of 78.

Johann Matthaus Heckmann, son of Johann Georg Heckmann and Maria Clara Kramer, was born on July 27, 1771 in Sennfeld, Baden, Prussia and died on March 1, 1848 in Sennfeld, Baden, Prussia at the age of 76. He married Anna Margaretha Eckhard, daughter of Philipp Eckhard and Anna Magdalena Murdel, on May 9, 1796 in Leipheim/Ulm, Baden. She was born on March 22, 1772 in Leipheim/Ulm, Baden, Prussia and died on July 23, 1822 in Sennfeld, Baden, Prussia at the age of 50.

Anna Heinricka Heckmann, daughter of Johann Matthaus Heckmann and Anna Margaretha Eckhard, was born on March 14, 1797 in Sennfeld, Baden and died on June 1, 1832 at the age of 35. She married Johann Balthauser Heilmann on July 31, 1825. He was born in 1796 and died in 1830 at the age of 34.

Georg Matthaus Heckmann, son of Johann Matthaus Heckmann and Anna Margaretha Eckhard, was born on June 19, 1801 in Sennfeld, Baden and died on May 15, 1859 at the age of 57. He married Maria Susanna Jung on April 26, 1829 in Sennfeld, Baden. She was born on November 23, 1803 in Sennfeld, Baden and died in 1834 at the age of 30.

Johann Andreas Heckmann, son of Johann Matthaus Heckmann and Anna Margaretha Eckhard, was born on January 26, 1804 in Sennfeld, Baden and died on January 14, 1866 at the age of 61. He married Rosina Dorothea Ganzer on February 5, 1832. She was born on February 20, 1813 and died on March 29, 1886 at the age of 73.

Christian August Heckmann, son of Johann Matthaus Heckmann and Anna Margaretha Eckhard, was born on November 17, 1807 in Sennfeld, Baden and died on March 14, 1863 at the age of 55. He married Anna Katharina Weiss on September 22, 1833. She was born on March 6, 1810 in Guttenbach, Baden and died on November 25, 1870 at the age of 60.

Johann Heinrich Martin Heckmann, son of Johann Matthaus Heckmann and Anna Margaretha Eckhard, was born on November 24, 1812 in Sennfeld, Baden, Prussia and died on February 12, 1883 in Sennfeld, Baden, Prussia at the age of 70. He married Eva Christina Betz, daughter of Johann Gorg Andreas Betz and Marie Barbara Gramlich, on September 25, 1836 in Sennfeld, Baden. She was born on July 6, 1816 in Sennfeld, Baden, Prussia and died on December 28, 1878 in Sennfeld, Baden, Prussia at the age of 62.