David Hennen Morris
|David Hennen Morris|
|Born||April 24, 1872
New Orleans, Louisiana
|Died||May 4, 1944|
|Residence||19 E. 70th Street, New York|
|Education||Harvard University, Columbia University|
|Occupation||Lawyer, businessman, diplomat, racehorse owner|
|Known for||Co-founder of IALA|
|Spouse(s)||Alice Vanderbilt Shepard|
|Children||Dave Hennen (Jr.), Louise, Lawrence, Noel, Emily, Alice|
|Parents||John Albert Morris & Cora Hennen|
Born in New Orleans, Louisiana to John Albert Morris and Cora Hennen, the daughter of Judge Alfred Hennen. He earned a Masters degree from Columbia University and in 1896 graduated from Harvard University. He became an attorney and was admitted to the New York Bar. Following his father's death in 1895, Dave Morris inherited considerable wealth and held business interests in railroads, hotels, and other enterprises. He was vice-president of the St. Louis Southwestern Railway Co. (Cotton Belt Route).
From 1933 to 1937, he was the United States Ambassador to Belgium and Envoy to Luxembourg. During this joint appointment, he resided in Belgium, where he and his wife continued to make international contacts for the language that would later take the name Interlingua. He also was Vice President of the Research Corporation and Counselor of the Belgian-American Educational Foundation, where Ezra Clark Stillman was Secretary.
With his wife Alice Vanderbilt Shepard, a granddaughter of William Henry Vanderbilt, he co-founded the IALA, which in 1951 would present Interlingua to the general public. He was treasurer of the IALA from its establishment in 1924 to his death in 1944. His son, Lawrence, then assumed the position.
In 1928 the Morris's twenty-four-year-old son Noel committed suicide.
Thoroughbred horse racing 
His father was a prominent figure in Thoroughbred horse racing who owned Morris Park Racetrack in The Bronx, New York. David Morris and brother Alfred, a Vice-Chairman and steward of The Jockey Club, owned, bred, and raced a number of successful Thoroughbreds. Among their major racing wins were the 1898 Belmont Stakes with Bowling Brook, and the 1899 Kentucky Derby with Manuel.
- DiBrino, Nicholas. The History of the Morris Park Racecourse and the Morris Family (1977) Bronx Historical Society ISBN 0-941980-27-8
- Bray, Mary Connell  (1971), "Foreword", Interlingua-English: A dictionary of the international Language, Second Edition, New York: Frederick Ungar Publishing Company. ISBN 0-8044-0188-8. OCLC 162319.
- Biographias: Dave Hennen Morris, Historia de Interlingua, 2001, Revised 2006.
- November 12, 1928 TIME magazine death notice for Noel Morris
- Profile of David Hennen Morris at the New York City Chapter of the American Guild of Organists