contact me directly.Are you talking about Jerry Taylor's Towns County book?
In Dec. 1852 (Union Co.), Jarrett Erslie Allen applied for letters of Guardianship of his 7 minor siblings (all named and designated "minor children of Robert Allen, late of this county"), including Thompson Allen.In Feb. 1853 J.E. was appointed guardian. J.E. had married Lucretia McNabb in Oct. 1850 and had his first child by 1852.In 1856 Jarrett Burch dies and names his 8 grandchildren, heirs of Robert Burch and Lydia Burch, dec'd.They were the same 7 children as named in J.E. Allen's application for guardianship plus J.E. Allen, himself.In July 1856, J.E. Allen, as "guardian of children of Robert Allen", applied to court to sell bounty land (again, if Thompson is yours, you must research his father Robt's war file).
In Town's Co. Feb. 1858, Lucretia Allen was appointed guardian of the children of her late husband, Jarrett Erslie Allen (it was the practise then that the surviving spouse had to apply, whether male or female, for guardianship of their own children).I can't find the date, but John Allen (Towns Co.---with George W. Brown as security) was appointed guardian of the 4 still minor children (Mary M., James R., Joseph P. and Thompson)of Robert Allen when his brother died.The records named these children as those of Robt. Allen.As guardian, John Allen later files a return showing a note on Abner Chastain and a receipt on James Allen (Robt's brother?).
The Chastain note is significant as earlier Haywood/Macon Co. N.C. Allens were intermarried with Chastains and the Union Co. Chastains moved from Haywood/Macon Co. via Habersham Co. Ga.. Among the original land owners in Macon Co. (county actually formed in 1828 from Haywood, but Indian land to be Macon county was auctioned 1820) in 1820 was at least one James Allen in Section 4 with a Chastain family.In section 5 were Edward Chastain and Alford Nicholson living side by side.Alford was married to Mary Chastain, daughter of Edward Brigand Chastain, and it was Edward's children that comprised the Chastains in Union Co. Ga. circa 1850.
In 1850 Union Co. (this census online), 5 of Robt Allen's children are shown in their grandparents, Jarrett and Milly Pinson Burch's house (#919).These include Thompson age 6.This age could be in error in the census, since it would indicate Thompson was much younger than 11 (as you state) when his parent's died (do you have their death dates or how they died?--contact me direct).Elisha Allen (age 20--this must have been Erslie) is seen in his uncle William Burch's (Jarrett and Milly's son) house #165.I don't know where the other two children (James--age guess 11? and John--age guess late teens?)were at this time.
By the way, the Barbary Edwards Allen (65 N.C. widow of Lemuel?) of Habersham you mentioned appears to be in house #1041 of this 1850 Union Co. census.4 doors away is Washington Allen (36 N.C.).Other Allens are in houses #165 (Larkin--probably related to Robt), #820 and #821.
As to the William Allen land transaction in Habersham, it obviously occurred much earlier (when? 1820's?).So, how could William's father John be Thompson's brother John who was a minor in 1852?These two Johns would be several generations removed. Keep in mind there were a lot of John Allens in the Southeast U.S. between 1820 and 1850.For instance, in 1848, a John M. Allen witnessed a deed from Joseph W. Pinson (Jarrett Burch's nephew) in Cass Co. Ga. for land in Gilmer Co.I don't have any idea if John M. Allen was related to the Union/Gilmer Pinson/Burch/Allens.There were undoubtedly several completely different Allen lines in Northeast Ga. by 1850.What you need to do is proceed backward using what you know to be true.Work back through the generations.We know, based on multiple recorded documents that Robert and Lydia Burch Allen had a son Thompson born c. 1844, but you seem unsure he is your Thompson Allen.So, you need to work backwards to prove that point, looking for associations with known Pinson/Burch/Allen clan members along the way.You're lucky that Thompson Allen is a distinct name, and if there are other Thompson Allens in the area at the same time, they are probably somehow related.However, I have seen cases where 2 people with the same strange name, living in the same area, couldn't be shown to be related at all.