Records seem to agree that Billy was born sometime between September-November, 1859. But they disagree about the specifics.
Some researchers have claimed that William Henry McCarty was born at 210 Greene Street, New York City, on September 17, 1859. He was christened Henry McCarty on September 28, 1859 at the same church in which his parents had been married. His godparents were Thomas Cooney and Mary Clark.
The website www.aboutbillythekid.com disputes that information, saying: “Birth dates of November 20, 1859 and September 17, 1859 have popped up, but there's no proof or even a hint of these dates being accurate.”
Billy later adopted the surname Bonney. At various times he was also called Henry Antrim. But the name by which he was generally known was "Billy, The Kid"
At the age of 21 he was shot and killed by Sheriff Pat Garrett Patrick Floyd Garrett in 1881 at Fort Sumner, New Mexico.
In the News
Another photograph of "Billy The Kid" was discovered.
DeMattos, Jack, "The Search for Billy the Kid's Roots - Is Over!" Real West (No. 167), January 1980 - pp. 26-28, 59-60.
Letter from Rev. James B. Roberts, Church of St. Peter, New York City, to Jack DeMattos, March 24, 1979. The Church of St. Peter is located in Lower Manhattan, close to the World Trade Center and a short distance from the Brooklyn Bridge.
"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MCWP-ZL8 : 13 December 2017), Henry Mc Carthy in entry for Patrick Mc Carthy, 1860, Manhattan First Ward, June 26, 1860, p. 176. Greene Street is located in lower Manhattan, close to the section now called "Little Italy." It is also located within walking distance of The Church of St. Peter, where Billy the Kid was baptized.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MZT2-9LJ : 5 September 2017), Wm Bonny, Fort Sumner and Cedar Springs, San Miguel, New Mexico, United States; citing enumeration district ED 37, sheet 436B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0803; FHL microfilm 1,254,803.