N.B. Before 30 Dec 2014 a Sally Jones was shown as one of two wives of John Henry. I have removed her, as explained on her Wikitree page. If you have evidence that the marriage did take place, please notify me. Patricia Prickett Hickin
I also have a reference that John D. Henry was married to Sallie (sic) Jones. But, her oldest child (Joseph Henry) was born about 1770, when John was 13. Very unlikely. Jack Schaffer: Schaffer-615
John should not be confused with his younger half-brother, John Henry-1707, born 16 Feb 1796.
He was a Revolutionary War soldier, and is buried in an unmarked grave at "Leatherwood," Henry County, Virginia. He married Susannah Walker (she remarried 1798 to Richard White and died in Abingdon, VA). John and Susannah had one child, Edmund, born in 1791.
John probably saw his first military action as an 18-year-old volunteer in the company, led by his father, that marched toward Williamsburg on May 2, 1775 in response to the confiscation of gunpowder by the governor of Virginia, Lord Dunmore. By mid-1776 he had enlisted in the Virginia military and by December 1776 had been promoted to lieutenant. In January 1777 that Virginia light horse regiment had been adopted into the Continental Army under General George Washington. His promotion was an indication of his competence as a leader and as an expert horseman. In February 1777 he resigned from that regiment to take an appointment as captain in a Virginia artillery regiment that had been formed to defend the state. In March 1778 that regiment was ordered north to join General Washington at Valley Forge, where they spent the next three months training under General Henry Knox. In June 1778 he distinguished himself during the battle at Monmouth Courthouse, NJ, the longest (and hottest, with temperatures reaching 100 degrees F) battle of the Revolutionary War. John's regiment was involved in an artillery barrage that was described as the heaviest of the war to that point. Casualty estimates vary, but reports indicate that there were over 400 American casualties, dead and wounded, and over 1000 British. George Washington, in his account of the battle, makes mention of the gallantry of the artillery regiments. As the story was told, after the battle John walked among the American dead, lingering over the bodies of the men he had known; then drew his own sword, broke it to pieces, and grieved inconsolably. This story was originally told by John's older sister's (Martha) grandson, William Spotswood Fontaine to historian Charles Campbell, and erroneously identified the battle as the Battle of Saratoga.
Just following the battle at Monmouth Courthouse, he was among those listed as "sick" that were transferred to Princeton, NJ. It seems most likely that he suffered from what today is called Post-traumatic Stress Disorder (PTSD). Charles Campbell's account stated that he had gone "raving mad." Whether that accurately described his overt behavior is unknown. In August 1778, after three years of honorable service, he resigned from the Army. By that point his father had lost track of him and wrote General Washington for information regarding him. Washington wrote back that he had been found in Elizabeth, NJ and had little money, which Washington provided to him so that he could return to Virginia.
He subsequently began farming on the Leatherwood plantation his father owned in Henry County. He married Susannah Walker in about 1789 and his only child, Edmund, was born in 1791.
In the summer of 1791-92, John died from a riding accident at Leatherwood, in Henry County, although that appears to be anecdotal information 
His mother, Sarah Shelton Henry, died at the beginning of the Revolution in 1775 at Scotchtown, Hanover county, Virginia.
While governor, Patrick Henry carried on a courtship and on October 9, 1777, he married Dorothea Dandridge. Miss Dandridge was twenty-two years old, the same age as his son John. It has been conjectured that the son was also in love with Dorothea and that her marriage to his father contributed to his mental health issues some months later, but that is not proved by contemporary sources.
From Henry Family Genforum
"According to my records, Susannah married first, John Henry, oldest son of Patrick Henry, by whom she had one child, Edmund.John died ca 1792.Henry County Court order book, July session 1792 states:"Administration of the estate of John Henry, decd. is granted to Susannah Henry, widow and relict of the said John Henry, decd. who made an oath according to law & with George Hairston & David Lewis her securities entered into bond and Ackknowledged the same. Also Joseph Bouldin, David Sevier, John Alexander, Thomas Gooch or any three of them appointed to appraise the estate of John Henry, Decd. & return an Inventory thereof to the Court."
The inventory of the estate is listed in Henry County Will Book 1, page 258.David Sevier, J. Alexander and Joseph Bouldin appraised it at 377 pounds, 8 pence.
Susannah married Richard White 14 June 1798 (Henry County Marriage Bonds 1778-1849, page 57)
↑ Patrick Henry: Red Hill, Patrick Henry National Monument, Brookneal, VA 24528-3302 Date: 16 Nov 2007, URL: http://www.redhill.org/, Page: PATRICK HENRY’S FAMILY . . . 2. John born 1757 at Pine Slash died ca. 1791 "John born 1757 at Pine Slash died ca. 1791 at age 34 at "Leatherwood", Revolutionary War soldier, buried at Leatherwood, married Susannah Walker (she remarried 1798 to Richard White and died in Abingdon, Washington County, Virginia). Edmund born 1791, children, moved to Iowa ca. 1832, died 1855, age 63, buried in Pleasant Hill Cemetery, Percy, Iowa.
↑ Patrick Henry: Red Hill, Patrick Henry National Monument, Brookneal, VA 24528-3302 Date: 16 Nov 2007, URL: http://www.redhill.org/. Page: Family Timeline: http://www.redhill.org/ph/life/default_family.html Data: Text: John born 1757 at Pine Slash died ca. 1791 at age 34 at "Leatherwood", Revolutionary War soldier, buried at Leatherwood, married Susannah Walker (she remarried 1798 to Richard White, she died in Abingdon). Edmund born 1791, children, moved to Iowa ca. 1832, died 1855, age 63, buried in Pleasant Hill Cemetery, Percy, IA.
↑ Thomas Jewett , Patrick Henry: America's Radical Dissenter. Archiving Early America: Your Window To Early America. Copyright 1996-2007 Archiving Early America®. (Note: — Tom Jewett is presently an Assistant Professor at McKendree College. He retired from Southern Illinois University-Edwardsville, and holds the title of Professor Emeritus from that institution. URL: http://www.earlyamerica.com/review/2004_summer_fall/henry.htm, Page: middle of article on Henry.
Thomas Jewett , Patrick Henry: America's Radical Dissenter. Archiving Early America: Your Window To Early America. Copyright 1996-2007 Archiving Early America®. (Note: — Tom Jewett is presently an Assistant Professor at McKendree College. He retired from Southern Illinois University-Edwardsville, and holds the title of Professor Emeritus from that institution. URL: http://www.earlyamerica.com/review/2004_summer_fall/henry.htm.
It may be possible to confirm family relationships with John by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with John:
Henry-2086 and Henry-246 appear to represent the same person because: similar birth and death info; same spouse. However I do not believe John who married Susan(nah) Walker was the father of an Isaac Henry.
Henry-2086 and Henry-246 do not represent the same person because: These are definitely not the same person. The historical evidence indicates that John D. Henry, son of Patrick Henry, had only one child, a son named Edmund, born in 1791. There is no historical evidence that John D Henry married (to Susannah - not Susan - Walker) until about 1789, but certainly not before he was discharged from the military in 1778. John Henry-2086 is listed as having a son, George, born to Susan Walker Henry in 1774.
Henry-3105 and Henry-246 do not represent the same person because: This is more complex than simply merging these two people. The current page for Susan (Walker) Henry has her married to two John Henrys, one of which is the subject of this merger proposal. The other husband listed, also John Henry, has descendants listed (the GGGG grandson of whom is the profile manager) that are definitely not descendants of John D. Henry, son of Patrick Henry. The wife of John D. Henry, Susannah (Walker) Henry, was not married to two John Henrys. So, the duplication or confusion regarding these two John Henrys needs to be clarified before any merger should be undertaken.