Hi Steve, I checked your profile for John and found a couple of problems. It shows his middle initial as "A." his birth year as 1888, and his marriage in 1882.
Every reference I have found, except the 1900 US Census, shows his middle initial as "H."
Texas marriage records show that J. H. Chapman and Dollie Fiveash were married in Erath County, Texas, on 29 May 1898.("Texas, County Marriage Records, 1837-1977," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV14-KC3M : accessed 12 June 2016), J H Chapman and Dollie Fiveash, 29 May 1898, Marriage; citing Erath, Texas, United States, Citing county clerk offices, Texas; FHL microfilm 1,026,026. Page 135).
The 1900 US Census, Justice Precinct 7, Erath, Texas, shows that J. A. Chapman, 42 b. AL Feb 1858, lived with his wife Dollie, 33 b. TX March 1867, and 6 children: Roy, 16 b. Dec 1883; Luke, 14 b. Aug 1886; Boyd, 12 b. Sept 1887; Woody, 10 b. Dec 1889; Verna, 4 b. April 1896; and Clarence, 1 b. May 1899. The children were all born in TX. John's parents were both born in Tennessee, while Dolly's father was born in Alabama and her mother in TX. The Census shows that the number of years that they have been married is unknown, but Dolly has had 1 child, and that that child is still living. Where is shows Mariiage, M2 was entered for both J.A. and Dollie, but then it was crossed out.("United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3GM-SMW : accessed 12 June 2016), J A Chapman, Justice Precinct 7 (excl. Thurber town), Erath, Texas, United States; citing sheet 9A, family 143, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,241,632.)
Given the 1898 marriage year for John and Dollie, Clarence is probably the only child of this marriage up to this time. The other children are probably the children of an earlier marriage by John.