Collier might be a middle name. Since there is a 1920 census for the family and father and son are carpenters , you might be able to get stuff from calling the Woodruff library.
This is John Thomas Garrett i made up added his census someone has added the wrong John Garrett to Mattie Simmons this man was always married to the same lady named Anne Hudson https://www.wikitree.com/wiki/Garrett-7489. I will fix this find a grave if I find the John Garrett that was married to Mattie Simmons but the tombstone doesn't say she was Mattie Simmons it says Mattie Garrett wife of John Garrett the one on the tombstone may not even be Mattie Simmons. right? Thanks Eddie some of these Garretts and or Simmons may see this and explain. Lol