William was born about 1852. William Mashburn ... 
No more info is currently available for William Mashburn. Can you add to his biography?
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MC3J-34G : 12 April 2016), William J Mashburn in household of William Mashburn, Georgia, United States; citing p. 17, family 111, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,666.
Have you taken a DNA test for genealogy? If so, login to add it. If not, see our friends at Ancestry DNA.