The picture on the memorial is also almost certainly NOT a picture of him, but an unidentified image.
David Holman is actually fairly well documented in LDS church records as he was an early member, and a bit infamous as the first person to have his home burned by a mob in Illinois, near the LDS second temple in Nauvoo.
Source: Seventies Record, 2nd Quorum, Biographical Sketches, LDS Church Archives, Pg. 24. (Obtained copy at LDS Lands and Records, Nauvoo, IL, August 2002 JHS)
I, David Holman, youngest son of Jonathan and Zilpha Sawyer Holman, was born in Templeton, Worcester County, Massachusetts, came from there to New York state in the fifth year of my age. Lived there 23 years then came to ?Perma (?Palmyra), lived there two years. Embraced the gospel, came to Kirtland, went from there to Missouri with the brethren in the difficulties of the Church. Was in prison with Joseph and those who were with him. Came to Illinois with the Church. Went to Pennsylvania with my family, was gone three years. Returned with my family. Had been there about one month when I had my house burned and all it contained by wicked men on December 18,1844. Witnessed the death of the Prophet Joseph and Hyrum, the patriarch of the Church of Jesus Christ of Latter-day Saints. [Nauvoo, November 17, 1845]
(Note: Oldest child born in Pennsylvania; next child born in Illinois. Matches above statement.)
NIGHTFALL AT NAUVOO BY Samuel A. Taylor
Page 192, "In December, 1843, a Mormon farmer near the LDS Settlement of Ramus, some twenty miles east of Nauvoo gained a dubious distinction: David Homan became the first Mormon to have his house burned by a mob in Illinois. This signaled the beginning of the type of violence that had driven the Saints from New York, from Jackson County, Missouri, from Ohio and the remainder of Missouri. The days of Nauvoo the beautiful were numbered."
Censused in 1850 in Pottawattamie county, Iowa, with wife Eliza, children Hyrum, Selina, Paulina, Heber. (occupation not shown)
Censused 1856 in West Liberty, Mills county, Iowa, occupation Farmer, with wife Eliza, children Hiram, Sabina E., Palina A., Heber, Elizabeth, Laura A.
No 1860 census located.
He was not a dentist, but a farmer. He married Eliza Coffman. His LDS membership records provide his parents (Jonathan Holman and Zilpah Sawyer), date/place of birth (15 July 1808, Templeton, Worcester county, Massachusetts). He became an LDS member 30 July 1837. They note he had resided in Kirtland, Geauga county, Ohio, and in Missouri. "Comments: David's house was burned by the mob in Illinois. 2. He covenanted to assist Saints in removal from Missouri. Comments: #21. David petitioned for $930 in damages experienced in Missouri."
David's death date comes from his gravestone, 20 December1862. His cause of death is not known as no death records were kept at that time, nor is it found in any of the early newspaper extractions. He had at least seven children with his wife, the last born in about 1861. Oldest child born ~1843 in Pennsylvania; next born ~1845 in Illinois; next three born in Iowa, ~1851, 1853, 1855; then one born in Nevada ~1861. Based on their birthplaces, they came to Nevada no earlier than 1856 and no later than 1861.
Eliza and the children are in the 1870 census in Gold Hill, Storey county, Nevada.
Contributor: L McKeown (49361309)
Eliza Coffman Holman