James T. Rayfield (b. 1810) and J. Trezevant Rayfield (b. 1814) are definitely two different men and apparently brothers. James T. Rayfield never shows up as head of a household in any census, but there are more records about him than any of the other children of John and Elizabeth Rafield. (By the way, Strange as Elizabeth's last name is just my latest best guess, unless you have found something more. We know the Rayfields came out of the Sumter District in SC and a close associate of the whole family -- married two Rayfield sisters -- was James T. Strange, so when John and Elizabeth named their oldest son James T. Rayfield, it made me think she might be a Strange).
There where 13 children: add James T. (b. 1810), Banion (b. 1813), George (b. 1818)and Amanda (b. 1836)(might be a granddaughter) but no Margaret so instead of Margaret, there was a Mary R. and then Sarah.Trease was born in 1814 according to his tombstone and census records. He married Eva Rossannah Kistler.
I descend from Charles Rayfield (b. 1822) and he had several sons and named some of them Trease, Andrew and George after his brothers.
Banion Rayfield (b. 1813) may have some connection to the divorce of James T. and Lavinia Horton Rayfield. If you want to know my theory, let me know your email address and I will share my thoughts.