"Tennessee State Marriage Index, 1780-2002," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:VN6D-424 : 4 December 2014), Vandiver Ervin and Mary Ann Hawkins, 11 Jan 1870; from "Tennessee State Marriages, 1780-2002," database and images, Ancestry (http://www.ancestry.com : 2008); citing p. 62, Monroe, Tennessee, United States, Tennessee State Library and Archives, Nashville, Tennessee.
"Find A Grave Index," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:QVKH-VGLW : 13 December 2015), Mary Ann Hawkins, 1928; Burial, Bloomington Springs, Putnam, Tennessee, United States of America, Bloomington Springs Cemetery; citing record ID 37996059, Find a Grave, http://www.findagrave.com.
"United States Census, 1860", database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:M8T1-5C2 : 26 July 2017), Mary A Hawkins in entry for E C Hawkins, 1860.
"United States Census, 1860", database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:M8TD-N82 : 26 July 2017), Mary Hawkins in entry for James H Hawkins, 1860.
"United States Census, 1870," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:MDDD-8CD : 12 April 2016), Mary Hawkins in household of Louis Hawkins, Tennessee, United States; citing p. 21, family 130, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 553,043.
"Find A Grave Index," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:QVLQ-Y1BC : 11 July 2016), Martha Ann Ervin Hawkins, 1923; Burial, Madisonville, Monroe, Tennessee, United States of America, Oak Grove Church Cemetery; citing record ID 85249594, Find a Grave, http://www.findagrave.com.
"United States Census, 1870," database with images, FamilySearch(https://familysearch.org/ark:/61903/1:1:MDDJ-R47 : 12 April 2016), Vandiver Ervin, Tennessee, United States; citing p. 24, family 160, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 553,048.
I looked for her death record with no luck. Thinking it would name her parents.