Mark Twain Family Tree: People, Sources and Citations

Everyone on the chart

Who is who on the Mark Twain family tree

Who was alive

All 16 people on the chart are listed.

The people on the chart, in the order of its rows.
Portrait	Person	Years	Life	On the chart
JM	John Marshall ClemensFather	1798–1847	He died in Hannibal in 1847. Sources1 2	Find on the chart
	Jane Lampton ClemensMother	1803–1890	She died at Keokuk, Iowa. Sources1 2	Find on the chart
	Orion ClemensEldest brother	1825–1897	Married Mollie Stotts in 1854. Sources1 2	Find on the chart
PC	Pamela Clemens MoffettSister	1827–1904	Married William Anderson Moffett in 1851. Sources1 2	Find on the chart
PH	Pleasant Hannibal ClemensBrother	1829?–1829?	Died aged three months. Sources1	Find on the chart
MC	Margaret ClemensSister	1830–1839	Died aged nine in 1839. Sources1	Find on the chart
BC	Benjamin ClemensBrother	1832–1842	Died aged nine in 1842. Sources1	Find on the chart
HC	Henry ClemensYoungest brother	1838–1858	Died after the explosion of the steamboat Pennsylvania. Sources2	Find on the chart
	Samuel ClemensMark Twain	1835–1910	The index person of the Mark Twain family tree. Married Olivia Langdon in 1870. Sources1	Find on the chart
	Olivia LangdonWife	1845–1904	Daughter of Jervis Langdon of Elmira. She died in Florence. Sources2	Find on the chart
LC	Langdon ClemensSon	1870–1872	The only son. He lived nineteen months. Sources2	Find on the chart
	Susy ClemensEldest daughter	1872–1896	Died of spinal meningitis in Hartford. Sources2	Find on the chart
	Clara ClemensDaughter	1874–1962	The only child to outlive her father. Sources1 2	Find on the chart
	Jean ClemensYoungest daughter	1880–1909	Died at Stormfield on Christmas Eve 1909. Sources2	Find on the chart
	Ossip GabrilowitschHusband of Clara	1878–1936	Russian pianist and conductor. Sources2	Find on the chart
NG	Nina GabrilowitschOnly grandchild	1910–1966	The last direct descendant of Mark Twain. Sources1	Find on the chart

For a paper or a lesson

Cite, print and download

The article is unsigned, so the site stands as author and the date is its last revision. Cite the numbered sources for the facts and the article for the chart. Each reference gives the address of the article.

APAGenogram Builder. (2026, November 10). The Mark Twain family tree, from John Marshall Clemens to Nina Gabrilowitsch. https://genogrambuilder.org/history/mark-twain-family-tree
MLA“The Mark Twain Family Tree, from John Marshall Clemens to Nina Gabrilowitsch.” Genogram Builder, 10 Nov. 2026, https://genogrambuilder.org/history/mark-twain-family-tree.
ChicagoGenogram Builder. “The Mark Twain Family Tree, from John Marshall Clemens to Nina Gabrilowitsch.” Last modified November 10, 2026. https://genogrambuilder.org/history/mark-twain-family-tree.
HarvardGenogram Builder (2026) The Mark Twain Family Tree, from John Marshall Clemens to Nina Gabrilowitsch. Available at: https://genogrambuilder.org/history/mark-twain-family-tree (Accessed: 10 November 2026).

The files are drawn in this browser from the chart of the article, with the credit of every portrait under it.

Numbered

Sources

Every source of this Mark Twain family tree was opened on 10 November 2026. The dates come from the genealogy page of the Mark Twain Boyhood Home and Museum and from the family biographies of the Mark Twain Project. Where the two disagree, on the birthplace of Clara and the day Jean died, the text gives both.

Mark Twain Boyhood Home and Museum