I do not know how far you have gotten on your research.The BROCKWELL'S are not my line.However they were related to the FRANKUM'S of Obion CO., TN.DONIE FRANKUM was married to JAMES JASPER FAULKNER which is my line.
Also to note I believe that THEO and CLAUD BROCKWELL are brothers and they had another brother GEORGE.George was married to a SALLIE Unknown.George died in Plymouth MI but I am not sure about Sallie.Sallie was one of my mothers very best friends.My mother was LOTTIE BRANTLEY WRIGHT b. 1906 in Paducah, KY.Her grandmother was ELIZABETH FAULKNER MADDEN.Elizabeth's brother JAKE FAULKNER was the father of James Jasper FAULKNER.
I have traced the Brockwell's in Obion CO., Tn as you have.I have been trying to find out Sallie Unknown Brockwell's maiden name.
Seems that the Brockwell's, Frankum's, Faulkner's,Polsgrove's, Jones and Ferguson's of Obion CO., TN where all intermarried.I have been trying to sort them out
I have just started to work on all of the above.If you think we can help each other out, then please respond to this post.