Joel Brown's father Samuel was apparently a son of a Thomas Brown....and a grandson of the Francis Brown who died in Chesterfield Co., VA in the mid-1750s. That Francis Brown (born about 1700; married to a Christiana Unknown) had moved to Chesterfield Co., VA around 1753 from Essex Co., VA. One of the other sons of this Francis Brown was a Hezekiah Brown, and Hezekiah moved to the Amelia/Dinwiddie Co., VA area by 1755 (that branch of the family married into both the Irby and the Epps/Eppes families). We have a living male Brown DNA donor out of Hezekiah's line, and his DNA matched "Group 10" at the Brown Society DNA testing project.
If you know of a living male Brown descendant of Joel Brown, he should join the DNA testing project to see if he also matches "Group 10." This would be an excellent "double check" on the above apparent lineage of Joel Brown.
Note: Based on a lot of research, there is a pretty good chance that the above Francis Brown (born about 1700 and married to Christiana Unknown) was a son of the Thomas Brown who was born in the 1600s and who appeared as an adult on some records in Essex Co., VA as early as 1704. That "first"/"oldest" Thomas Brown in Essex was the witness on the 1708/1709 Essex Co., VA will of another Francis Brown (a son of yet a third/older Francis Brown who died in Essex Co., VA in 1691/1692). We SUSPECT that all of these Browns were members of DNA "Group 10."