This may be Charles L, son of Caroline/Callie with siblings in census data?
United States Social Security Death Index," index, FamilySearch (https://familysearch.org/ark:/61903/1:1:JY2J-DM7), Charles Culberson, Sep 1962; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing
Charles Culberson
Age:,78
Given Name:,Charles
Surname:,Culberson
Birth Date:,03 Jul 1884 State:,Tennessee
Event Date:,Sep 1962 Georgia
United States World War I Draft Registration Cards, 1917-1918," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KZ6W-TRZ), Charles Lee Culberson, 1917-1918; citing Chattanooga City no 2, Tennessee, United States, NARA microfilm publication M1509 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,852,926
Name:Charles Lee Culberson
111 Whiteside, Chattanooga, TN
Enameler: Cahill Iron Works
Draft Registration Chattanooga City no 2, Tennessee,
Date: Sept. 12, 918
White Male Age 34 Blue eyes Black Hair
Birth Date:03 Jul 1884
Wife: Mrs. Ella Culberson
US Census, 1900 Civil District 18 Athens town (part), McMinn, TN
United States Census, 1900," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSCX-YT2 ), Callie Culberson, Civil District 18 Athens town (part), McMinn, Tennessee, United States; citing sheet 9A, family 194, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,585
Callie Culberson ,Head,F,43,NC (Caroline) Widow Oct. 1857
Anice Culberson ,Daughter,F,17,TN
Charles L Culberson ,Son,M,15,TN
Mary A Culberson ,Daughter,F,12,TN
Malcom Culberson ,Son,M,7,TN
USCensus, 1910, Caroline Culberson, Civil District 2, McMinn, TN https://familysearch.org/ark:/61903/1:1:MGXQ-8HH
This page lists some other children of Charles and Ella Curtis: Catharine, James Allen, Charles Leroy?
https://familysearch.org/search/record/results?count=20&query=%2Bgivenname%3Acharles~%20%2Bsurname%3Aculberson~%20%2Bbirth_place%3Atn~%20%2Bbirth_year%3A1883-1887~%20%2Bspouse_givenname%3Aella~%20%2Bspouse_surname%3Acurtis~%20%2Bfather_surname%3Aculberson~