Anna Elisabeth Franziska von Westphalen1 
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Bertha Julie Jenny von Westphalen1 
From 19 June 1843, her married name became Marx.1
Children of Bertha Julie Jenny von Westphalen and Karl Marx
- Jenny Caroline Marx1 b. 1 May 1844, d. 11 Jan 1883
- Jenny Laura Marx1 b. 26 Sep 1845, d. 26 Nov 1911
- Charles Louis Henri Edgar Marx1 b. 3 Feb 1847, d. 6 Apr 1855
- Heinrich Edward Guy Marx1 b. 5 Nov 1849, d. 19 Nov 1850
- Jenny Evelin Francis Marx1 b. 28 Mar 1851, d. 14 Apr 1852
- Jenny Julia Eleanor Marx1 b. 16 Jan 1855, d. 31 Mar 1898
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Karl Marx1 
He wrote the book Manifest der Kommunistischen Partei, published 1848.1 He wrote the book Das Kapital, published 1867.1
Children of Karl Marx and Bertha Julie Jenny von Westphalen
- Jenny Caroline Marx1 b. 1 May 1844, d. 11 Jan 1883
- Jenny Laura Marx1 b. 26 Sep 1845, d. 26 Nov 1911
- Charles Louis Henri Edgar Marx1 b. 3 Feb 1847, d. 6 Apr 1855
- Heinrich Edward Guy Marx1 b. 5 Nov 1849, d. 19 Nov 1850
- Jenny Evelin Francis Marx1 b. 28 Mar 1851, d. 14 Apr 1852
- Jenny Julia Eleanor Marx1 b. 16 Jan 1855, d. 31 Mar 1898
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Helena Laura Cecilia Charlotte Friederike von Westphalen1 
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Gerhard Oscar Ludwig Edgar von Westphalen1 
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Heinrich Marx1 
Child of Heinrich Marx and Henriette Presburg
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Henriette Presburg1 
Her married name became Marx.1
Child of Henriette Presburg and Heinrich Marx
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Jenny Caroline Marx1 
From 1872, her married name became Longuet.1
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Charles Félix César Longuet1 
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”
Jenny Laura Marx1 
From 2 April 1868, her married name became Lafargue.1
- [S6448] Bram Sonneveld, “re: Oppenheimer Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 27 November 2012. Hereinafter cited as “re: Oppenheimer Family.”