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.

Johann Matthias Heckmann, son of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on October 21, 1839 in Sennfeld, Baden, Prussia and died on March 1, 1897 in Milberger, Russell, Kansas at the age of 57. He married Catherina Wilhelmina Lebert on November 4, 1866 in Bofsheim, Baden. She was born on January 24, 1848 in Bofsheim, Baden and died on November 19, 1916 in Audubon Twp, Audubon, Iowa at the age of 68.

Johann Heinrich Heckmann, son of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on July 17, 1841 in Sennfeld, Baden, Prussia and died on July 31, 1908 in Exira, Audubon, Iowa at the age of 67. He married 2 times. The first time he married Susanna Katharina Gramlich on May 21, 1871 in Sennfeld, Baden. She was born on February 6, 1845 in Sennfeld, Baden and died on November 17, 1893 in Exira, Audubon, Iowa at the age of 48. The second time he married Magdalena Hettinger on March 5, 1894 in Hamlin Twp, Audubon, Iowa. She was born about 1844 and died before 1900.

Johann Gottfried Heckmann, son of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on December 11, 1842 in Sennfeld, Baden, Prussia and died on May 23, 1905 in Bodigheim, Baden, Prussia at the age of 62. He married Katharina Susanna Zink on April 8, 1866. She was born on January 29, 1835 in Bodigheim, Baden and died on January 26, 1891 in Bodigheim, Baden at the age of 55.

Johanna Christina Heckmann, daughter of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on July 2, 1844 in Sennfeld, Baden, Prussia and died in 1900 in Mannheim/Waldorf at the age of 55. She married Johann Ludwig Gramlich on November 9, 1866 in Bofsheim, Baden. He was born on November 20, 1835 and died on October 4, 1899 at the age of 63.

Johann Christian Heckmann, son of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on August 24, 1846 in Sennfeld, Baden, Prussia and died on December 3, 1924 in Exira, Audubon, Iowa at the age of 78. He married 2 times. The first time he married Susanna Christiana Reichert, daughter of Philip Adam Reichert and Christiana Barbara Matzer, on March 3, 1872 in Sennfeld, Baden. She was born on November 15, 1849 in Sennfeld, Baden, Prussia and died on October 3, 1897 in Audubon Twp, Audubon, Iowa at the age of 47. The second time he married Catherina Wilhelmina Lebert on April 8, 1901. She was born on January 24, 1848 in Bofsheim, Baden and died on November 19, 1916 in Audubon Twp, Audubon, Iowa at the age of 68.

Sophia Friedricka Heckmann, daughter of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on April 28, 1852 in Sennfeld, Baden, Prussia and died on October 18, 1897 in Germany at the age of 45. She married Johann Andreas Heckmann on December 23, 1879 in Sennfeld, Baden. He was born on July 27, 1839 in Sennfeld, Baden and died on April 19, 1907 in Germany at the age of 67.

Johann Jacob Heckmann, son of Johann Heinrich Martin Heckmann and Eva Christina Betz, was born on October 4, 1860 in Sennfeld, Baden, Prussia and died in 1879 at the age of 18. He married Anna Christenia Bachmann in 1875. She was born in 1859 and died in 1875 at the age of 16.