Marie Dorothea Elisabeth Luddemann was born in Ovelgunne, which is now part of Eilsleben.

Dorothea was baptized February 4, 1838, in the Evangelical Lutheran Church in Eilsleben, Germany. Her baptismal sponsors were August Assel, Dorothea Grahn nee Assel, and Marie Sophie Luddemann.

Dorothea was confirmed April 4, 1852, in the Evangelical Lutheran Church in Eilsleben.

Dorothea Luddemann was the daughter of Johann Friedrich Christoph Luddemann (born 3 August 1805, in Ovelgunne, Germany; died 23 November 1877, in Ovelgunne) and his wife, Marie Elisabeth Assel (born 16 November 1808, in Siegersleben, Germany; died 30 January 1858, in Ovelgunne). They were married 8 April 1833, in Siegersleben, Germany.

Dorothea had five sisters:

(1.) Marie Elisabeth Luddemann born June 21, 1834, in Ovelgunne, Saxony-Anhalt, Germany, and she died October 21, 1869, in Ummendorf, Germany. Marie Elisabeth Luddemann married Heinrich Friedrich Rohloff on November 10, 1861, in Ummendorf, Germany. Heinrich Friedrich Rohloff was born 29 March 1836, in Ummendorf; son of Andreas Peter Rohloff and Dorothee Elisabeth Schwarze, and he died on 8 March 1881, in Ummendorf.

(2.) Marie Sophie Luddemann born September 9, 1836, in Ovelgunne, Saxony-Anhalt, Germany, and she died March 3, 1837, in Ovelgunne, Saxony-Anhalt.

(3.) Marie Sophie Elisabeth Luddemann born August 8, 1840 in Ovelgunne, Saxony-Anhalt, Germany, and she died 1 May 1884, in Eilsleben, Germany. Marie Sophie Elisabeth Luddemann married Heinrich Friedrich Andreas Keindorf on November 12, 1871, in Ovelgunne, Saxony-Anhalt. After her husband's death on 17 March 1872, in Bregenstedt, Germany, she secondly married Gottlieb Christian Heinrich Denecke on 30 May 1876, in Eilsleben, Germany.

(4.) Marie Elisabeth Luddemann born August 12, 1846, in Ovelgunne, Saxony-Anhalt, Germany, and she died November 9, 1847, in Ovelgunne, Saxony-Anhalt.

(5.) Sophie Elisabeth Luddemann born November 7, 1848, in Ovelgunne, Saxony-Anhalt, Germany.

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Dorothea's paternal grandparents were Andreas Christoph Luddemann (born April 12, 1769, in Ummendorf, Germany; died August 18, 1842, in Ovelgunne) and Anna Sophia Mueller (born April 20, 1769, in Eilsleben, Germany; died in Germany). They were married February 4, 1792, in Eilsleben, Germany.

Dorothea's maternal grandparents were Johann Lorenz Assel (born December 18, 1777, in Siegersleben, Germany; died September 28, 1854, in Siegersleben, Germany) and Maria Elisabeth Kohler (born November 18, 1787, in Siegersleben, Germany; died November 16, 1808, in Siegersleben, Germany). They were married November 22, 1807, in Siegersleben, Germany. After the death of his wife in 1808, Johann Lorenz Assel married Maria Elisabeth Salomone Freistedt on March 11, 1810, in Siegersleben.

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Dorothea Luddemann married Johannes Christoph Friedrichs on April 1, 1861, in Siegersleben, Germany. They were married 25 years when Christoph Friedrichs died of blood poisoning in June of 1886 at the age of 45 years.

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At her death, Dorothea Luddemann Friedrichs was survived by her son, Hermann Friedrichs; her daughters, Marie Blankenstein, Alwine Domke, Emilie Voigt, and Elsbeth Friedrichs; her 17 grandchildren, Mamie Blankenstein, Richard Blankenstein, Paul Blankenstein, Elsie Blankenstein, Alma Blankenstein, Elfriede Blankenstein, Alwine Domke, Karl Domke, Jr., Erna Domke, Otto Domke, Erna Friedrichs, Grete Friedrichs, Hans Friedrichs, Willi Friedrichs, Gustav Voigt, Jr., Emilie Voigt, and Ernst Voigt.

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Dorothea Friedrichs was preceded in death by her parents; her husband, Christoph Friedrichs; her son, Otto Friedrichs; her twin sons, Christoph Wilhelm Friedrichs and Carl Franz Friedrichs; and an unnamed infant son; and four grandchildren, Hermann Blankenstein, Rose Blankenstein, Freddie Blankenstein, and August Karl Domke.