Volume II Brown Genealogy, Part 2 Many of the Descendants of Charles Browne, By Cyrus Henry Brown, 1915, pg 468
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MF5C-S8Q : 19 February 2021), Willard Y Brown in household of John Brown, Blue Rapids, Marshall, Kansas, United States; citing enumeration district ED 165, sheet 208A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,388.
Kansas County Marriages, 1855-1911, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q293-V5GQ : 23 February 2021), Willard Y Brown and Miss Hannie E Cox, 27 Oct 1886; citing Marriage, Marshall, Kansas, United States, district clerk, court clerk, county clerk and register offices from various counties; FHL microfilm 2,027,273.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMY3-XGX : accessed 26 April 2021), William Brown, Blue Rapids Township Irving town, Marshall, Kansas, United States; citing enumeration district (ED) 55, sheet 6A, family 107, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,489.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:ML4D-FT3 : accessed 26 April 2021), Willard Y Brown, Barneston, Gage, Nebraska, United States; citing enumeration district (ED) ED 38, sheet 2A, family 43, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 846; FHL microfilm 1,374,859.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRK2-TY8 : 29 February 2020), Willard Y Brown, Summerfield, St. Bridget Township, Marshall, Kansas, United States; citing enumeration district (ED) 59-32, sheet 3A, line 19, family 65, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1245.