"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCTZ-FXY : 12 April 2016), Wm W Tweed in household of William M Tweed, New York City, ward 7, New York, New York, United States; citing family 128, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"New York State Census, 1855," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K6QY-545 : 13 March 2018), William M Tweed in household of William M Tweed, E.D. 1, Ward 7, New York City, New York, New York, United States; citing p. , line #44, family #210, county clerk offices, New York; FHL microfilm 1,018,654.
"New York, New York City Marriage Records, 1829-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:24ZR-4L1 : 10 February 2018), Wm. N. Tweed Jr. and Eliza A.D. Davis, 28 May 1868; citing Marriage, Manhattan, New York, New York, United States, New York City Municipal Archives, New York; FHL microfilm 1,544,133. Father Wm M Tweed, Mother Mary Jane Skaden, Bride Eliza A D Davis, Bride's father Silas Davis, Bride's mother Georgeanna Rodman.
"United States Census, 1900," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M9QJ-FBJ : accessed 5 February 2021), William N Tweed, North Side, St. Tammany, Louisiana, United States; citing enumeration district (ED) 98, sheet 3A, family 45, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,134.
Find A Grave, database and images (https://www.findagrave.com : accessed 07 June 2018), memorial page for William M. Tweed (14 Nov 1845–18 Feb 1902), Find A Grave Memorial no. 57424252, citing Green-Wood Cemetery, Brooklyn, Kings County (Brooklyn), New York, USA ; Maintained by T.V.F.T.H. (contributor 46496806). Image included. Also on stone: E Augusta D Tweed, 7 Jul 1847 - 23 Jan 1923.