Joseph was a son of Joseph Ambroselli and Cornelia Widerfield. He married Minnie A. Mays. On his death certificate his occupation was listed as "Art Painter."
Sources
1860 U. S. Census. Household of Jos. M. Ambroselli, enumerated 6 July 1860. Albemarle County, Virginia - St. Anne's Parish. Series M653, Roll 1331, page 25 (541). Washington, D. C. National Archives and Records Administration.
1870 U. S. Census. Ambrosellie family in the household of John Saunders, enumerated 27 June 1870. Albemarle County, Virginia - Fredericksville Parish. Series M593, Roll 1631, page 302A. Washington, D. C. National Archives and Records Administration.
District of Columbia, Select Marriages, 1830-1921 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc, 2014.
"District of Columbia Marriages, 1811-1950", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XLSK-F89), Joseph B Ambroselli and Minnie Aillayo, 1878. (Minnie A. Mays)
Virginia State Death Certificate of Joseph Bonaparte Ambroselli.
Grave marker of J. B. Ambroselli. City Cemetery, Roanoke, Virginia. Photograph by Audrey McGlynn September 2011. "J. B. / AMBROSELLI / DIED / FEB. 26, 1918 / MINNIE A. MAYS / His wife / DIED / JAN. 24, 1917."