David was the eighth child of ten children of Jonathan and Mary Elmer, born in 1725 in Norwalk, Connecticut Colony. In 1748 he married Jemima Curtice and they had eight children.
Col. [Samuel] Elmer told them they did not spell the name right; that it was not Elmer, but Elmore. The old gentleman would never change, but the boys ever after wrote it Elmore, according to his granddaughter Julia C. (Elmore) Hulbert.
An accident brought his life to an early end when hit on the head by a tree which he had cut down.
Family Memorials in Prose and Verse
Pages 326-328: NOTE V (see page 302) DAVID (ELMER) ELMORE'S FAMILY. From all the sources of information accessible, it appears that the family consisted of eight—five sons and five daughters. There is a little variance in statement as to whether Thaddeus Elmer or David Elmer was the oldest. The best evidence seems to give David priority, and the probability is increased, when the custom of naming the eldest son after the father is taken into consideration (In the following, names in brackets indicate the authority quoted).
DAVID ELMER, eldest Son. "His oldest son was named after himself, David; died early; I never saw him." [Julia C. (Elmore) Hulbert]. "David * * * married, and died at Hoosick, N. Y., leaving, at least one son." [Abba M. (Elmore) Wainright].
THADDEUS ELMER, second son. "Thaddeus was a farmer; lived in the same town (Canaan, N.Y.); had a large family, some of them persons of considerable note." [Julia C. (Elmore) Hulbert]. "I do not know whom he married; we called her 'Aunt Eliza.'" [Abba M. (Elmore) Wainright]. "Had children—Thaddeus, William, and Eliza, who settled in Canaan, Columbia County, N.Y. Perhaps thirty years ago, Thaddeus Elmore visited our family, staying a number of days." [Jas. H. Ball, grand-son of William Curtis Elmore, under date of May 1, 1880].
JONATHAN D. ELMORE, third son. "Jonathan, the third son, was in the mercantile business with my father in East Nassau for some years; eventually married Abba Toby, and spent the last of his days on a farm, not more than four miles from Lebanon Springs." [Abba M. (Elmore) Wainright]. "Was one good man." [Julia C. (Elmore) Hulbert].
ELIAKIM ELMER, fourth son. "My father was an Allopathic physician. In his early practice he kept pest-houses for small-pox; and when Dr. Jenner found that the cow-pox prevented taking the small-pox, father went to Boston and learned of Dr. Waterhouse (who had received instructions from Dr. Jenner), and was one of the first to vaccinate in the United States. * * * Father died about fifty years ago; his name was Eliakim." [Jonathan Jenner Elmore, under date April 16, 1880]. "My father's name was Eliakim. Our family had gone West to Genesee County before he died." [Solyman Elmore].
SALLY GEMIMA ELMER, oldest daughter. "My father's oldest sister's name was Sally Gemima Elmer. She married Samuel Gibbs, and became the mother of two children, Samuel E. Gibbs and Sally Gibbs. Samuel raised his family in E. Nassau, N.Y., but died in Troy, N.Y. Sally eventually married the Captain of a vessel on the North river." [Abba M. (Elmore) Wainright].
MARY ELMER, second daughter. "The second was named Mary. She married Stephen Gregory; lived and died in Sand Lake, about twelve miles east of Albany, N.Y." [Abba M. (Elmore) Wainright]. "They had children—David, Abram, Mary, Abbie, and Almina" [James H. Ball].
ABBA ELMER, third daughter. "Abba was the youngest of the girls. She married Nathan (or Nathaniel) Wheeler; lived and died in Cherry Valley, N.Y." [Abba M. (Elmore) Wainright]. " * * * * married a Wheeler, quite a mill man, who moved farther West; owned the Wheeler Mills, I think, in Chenango county." [Solyman Elmore].
WILLIAM CURTIS ELMORE, youngest son. "My earliest recollections of William Curtis Elmore are of going with my parents—who were on a visit to grandfather's—to visit Uncle William. I must have been five or six years old at the time. I think he was farming; could not say that it was in Kinderhook, but very possibly, as I think our journey was in that direction. After that, he moved to the north part of Nassau, where he lived and died. He owned a farm, kept a public house, and was a merchant besides—altogether a man of considerable note. After his death, his family sold and moved West. The oldest boy was a physician. His name was Howard. The next was David. I learned he was a Baptist minister. Their mother was a superior woman." [Julia C. (Elmore) Hulbert]. " * * * William Curtis was the youngest of the family, and lived at various places in New York State." [Abba M. (Elmore) Wainright].
Note: I am making an assumption that all the children were born in Sharon. Some are listed as New Canaan, could be wrong. As Canaan was described as 20 miles east of Albany, I am thinking that the Canaan is actually New Canaan, Columbia, New York, rather than Connecticut. Correct me if I'm wrong.
1784 • New Canaan, New York Colony (uncertain) 
Between 1772 and 1827 in New Canaan, New York Colony (uncertain), hit on the head by a tree which he had cut down. 
NOTE: Imported, only 1772 from Death Date and marked as uncertain.
David is confirmed through Y-chromosome DNA testing. Robert Elmore and Esco Elmer match on 36 out of 37 markers (see FTDNA kits 364027 and 369990) thereby confirming their direct paternal lines back to their MRCA Edward Elmer.
Big Y and YSEQ testing of descendants of Edward Elmer's sons Edward and Samuel have shown that men on this Y line carry SNPs R-A2276, R-A2278, R-A2280, R-A2281 and R-A2283 as family level SNPs.
Original text: DAVID ELMER OR ELMORE DAVID ELMER, OR ELMORE (fifth generation, spelling of name changed—see Note IV), son of Jonathan Elmer, and great-grand-son of Edward Elmer, b. (about) 1736, m. ______, d. ______. They had issue: - DAVID ELMORE; - THADDEUS ELMORE; JONATHAN D. ELMORE; - ELIAKIM ELMORE; - SALLY GEMIMA ELMORE; - MARY ELMORE; - ABBA ELMORE; AND - WILLIAM CURTIS ELMORE.
Page 778: David Elmer. (Jonathan3, Samuel2, Edward1), was born ca 1730* and married Jemima Curtis at Sharon 20 Oct. 1748. She was probably the daughter of Caleb and Jemima (_____) Curtis of Sharon and born 22 Feb. 1730. Jemima died of the small pox 11 Dec. 1784, age 54 and was buried in the Sharon Burying Ground.[NEBG22]. In 1766 Thomas Smith of Sharon chose David Elmore as Guardian. Smith was age 14. [Sharon CT records 9 April 1766]. David Elmore (he is allegedly the one who changed the name) seems to have come to Beekman just before his wife's death. *Virkus and HT both claim he was born ca 1736 and married Jemima Curtis. The Sharon records show they married 1748 so he must have been born about 1730 or before.
Page 779: The Country Journal and Poughkeepsie Advertiser of 27 Dec. 1786 carried the following notice:
BY virtue of an Execution to me directed, I shall expose to public sale on the premises, on Saturday, the 6th day of January next, the real and personal estate of David Elmore, of Beekman's Precinct. Herman Hoffman, Sheriff."
David Elmore is alleged to have died in Beekman in 1789 but there are no local records of his death or burial.
i. ?Thaddeus. b. 12 March 1752. Elizabeth Waldo married Thaddeus Elmore of Sharon, son of David Elmore.8 He died 25 Aug. 1807 at Canaan, Columbia County, NY. Thaddeus Elmore
Ancestry.com, Connecticut, Compiled Census and Census Substitutes Index, 1790-1890 [database on-line]. Repository: #R1
Original data: Jackson, Ronald V., Accelerated Indexing Systems, comp.. Connecticut Census, 1790-1890. Compiled and digitized by Mr. Jackson and AIS from microfilmed schedules of the U.S. Federal Decennial Census, territorial/state censuses, and/or census substitutes.
Original text: Name: David Elmer. State: CT. County: Litchfield County. Township: Norfolk. Year: 1745. Page: NPN. Database: CT 1635-1807 Misc. Records.
Ancestry.com, Connecticut, Church Record Abstracts, 1630-1920 [database on-line]. Provo, UT, USA: 2013.
Original data: Connecticut. Church Records Index. Connecticut State Library, Hartford, Connecticut.
Original text: Name: Abigail Elmer. Father's name: David Elmer. Mother's name: Jemima Elmer. Baptism Date: 22 Jul 1770. Baptism Place: Sharon, Connecticut, USA. Volume Title: Volume 101 Sharon
Page 302: DAVID ELMER, OR ELMORE (fifth generation, spelling of name changed—see Note IV), son of Jonathan Elmer, and great-grand-son of Edward Elmer, b. (about) 1736, m. ______, d. ______. They had issue:
- DAVID ELMORE;
- THADDEUS ELMORE;
- JONATHAN D. ELMORE;
- ELIAKIM ELMORE;
- SALLY GEMIMA ELMORE;
- MARY ELMORE;
- ABBA ELMORE; AND
- WILLIAM CURTIS ELMORE.
(For particulars in relation to David Elmer's family, see Note V.)
Dea. Jonathan ELMER (Samuel, Edward). Christened, 8 MAY 1687, in Hartford, CT. Died, 5 JUN 1778, in Sharon, CT.
He married Mary ( ). Born, 1690, in Hartford, CT. Died, 22 JAN 1783, in Sharon, CRT. Children:
i. Elizabeth ELMER. Born, CIRCA 1690, in Hartford, CT. She married Jonathan COE, 23 SEP 1737, in Durham, CT.
ii. Eliakim ELMER. Born, 1714, in Norwalk, CT. He married Lydia THROWBRIDGE, 9 MAY 1735, in Wilton, CT.
iii. Martin ELMER. Born, 1716, in Norwalk, CT. Died, 9 AUG 1780, in Sharon, CT (unmarried).
iv. Col. Samuel ELMER.
v. Mary ELMER. Born in Norwalk, CT. She married Matthew ST. JOHN, son of Matthew ST. JOHN and Ann WHITNEY, 1737, in Wilton, CT.
vi. Daniel ELMER.
vii. Abigail ELMER. Born, 1723, in Norwalk, CT. She married Silas KEELER, 14 APR 1746, in Ridgefield, CT.
viii. David ELMER.
ix. Rev. Jonathan ELMER.
x. Dr. Nathaniel ELMER.
History of the Elmore Family with Biographical Notes, "Grandfather settled in Sharon, Conn.; had a large family in good circumstances. Col. Elmer told them they did not spell the name right; that it was not Elmer, but Elmore. The old gentleman would never change, but the boys ever after wrote it Elmore. From thence, the family moved to New Canaan, as it was called [probably Canaan, Columbia County, is here intended], about twenty miles east of Albany. There he lived and died a farmer." Quoting Mrs. Julia C. (Elmore) Hulbert.
Elmore Historical Notes, by William Cronk Elmore: David Elmore was born about 1725, probably in Norwalk, CT, and afterwards went with his father to Sharon, CT. It is unlikely that he adopted the spelling Elmore at the time his brother Col. Samuel Elmer (Elmore) did, but it appears that his boys adopted the new spelling. David was a soldier in the revolutionary war. A grandaughter of David wrote to Theo. J. Elmore in 1880 that her grandfather's name was David Elmore, and that he had died tragiclly from an accident while felling a tree for firewood. It seems likely that this David Elmore was a brother of Thaddeus, a son of David. My father seemed to know that both David and his wife Gemima had died in a smallpox epidemic of 1784.
It may be possible to confirm family relationships with David by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: