"Texas Birth Index, 1903-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V8CF-C5T : 5 December 2014), Dolly May Lanier, 22 Apr 1923; from "Texas Birth Index, 1903-1997," database and images, Ancestry (http://www.ancestry.com : 2005); citing Texas Department of State Health Services.
Father Willis Lanier:
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VBVK-G73 : 27 January 2020), Dollie M Lanier in household of Willis L Lanier, Burney Township, Love, Oklahoma, United States; citing enumeration district (ED) 43-3, sheet 10A, line 26, family 186, 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 3308.
Edit to add: Not Willis, 'Willie.' He was born 1894, died 1970. Here's his death:
"Texas Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K3D5-L7L : 13 March 2018), Willie L Lanier, 21 Jul 1970; citing certificate number 59236, State Registrar Office, Austin; FHL microfilm 2,218,859. Parents Richard L Lanier and Maggie Houpt. Informant Carl Lanier.
Birth of son Carl, 1921:
"Texas Births and Christenings, 1840-1981", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F6G5-3BV : 13 February 2020), Carl Lee Lanier, 28 May 1921. Parents William Lee Lanier and Ada Hollars (born Tennessee).
Badly transcribed birth of son Claude, 1918:
"Texas Birth Certificates, 1903-1935," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X2JM-VF5 : 4 April 2020), Ada Hollars in entry for Joseph Claud Lineor, 26 Sep 1918; citing Bonita, Montague, Texas, United States, certificate 48483, Texas Department of Health, Austin; FHL microfilm 4,490,663. Father Willie Lineor [sic].
Willie's WW I draft card:
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KZXG-J5R : 24 August 2019), Willie Lanier, 1917-1918. Born 25 Jan 1894.
Ada was previously married to a man named Vanderson. Willie married Mrs Ada Vanderson in Montague County in 1917:
"Texas, County Marriage Records, 1837-1965," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV1C-HKYX : 10 December 2017), W L Lanier and Ada Vanderson, 18 Dec 1917; citing Marriage, citing Montague, Texas, United States, Texas State Library, Archives Division, and various Texas county clerks; FHL microfilm 1,435,393.