Brock is an incorporated town in Parker County, Texas, United States. James Monroe Maddux and Sarah Naomi were married in Georgia and had 12 children. The family moved to Arkansas and then to Olive Branch, Texas in 1876. The Maddux family was very religious and saw at once the need for a church and a school in the Brock community. On Februar…Brock is an incorporated town in Parker County, Texas, United States. James Monroe Maddux and Sarah Naomi were married in Georgia and had 12 children. The family moved to Arkansas and then to Olive Branch, Texas in 1876. The Maddux family was very religious and saw at once the need for a church and a school in the Brock community. On February 7, 1880, land for the churches, cemetery, and school in Brock were given to the community by James M. and Sarah N. Maddux.