Louis Kugelmann, or Ludwig Kugelmann (19 February 1828 in Lemförde – 9 January 1902 in Hannover), was a German gynecologist, social democratic thinker and activist, and confidant of Marx and Engels.

Personal life

Kugelmann married Gertrud Oppenheim (born 27 January 1839 in Bonn; died 1920 in Wiesbaden). They had a daughter Franziska Kugelmann (9 October 1858 in Hannover – 31 August 1939 in Wiesbaden). He met with Karl Marx several times, visited him in Hannover, and exchanged letters with him and Friedrich Engels during the period 1862 to 1893. He was a member of the International Workingmen's Association and later the Social Democratic Party of Germany.

Works