Re: John B. Carlan
I had a chance to look through my CARLIN family notes and I do not have any "proof" connecting the John Carlan family for whom I am researching to the Virgina family. You appear to have more in-depth information in your research than I do. What started me on this quest was when researching my own EPPERSON line I found an EPPERSON-CARLAN marriage which piqued my interest because CARLAN is my husband's birth mother's family.
Currently I am working backwards through time - starting in Florida and working back through Georgia, South Carolina, North Carolina, and who knows where the trail will take me from there. I recently found some Banks County Georgia Deeds, frming up the connection to John B. CARLIN.
As for the Grayson County, Virginia family, I have a CLOUD family researcher's information concerning family intermarriage with CARLAN:
-- Descendants of William CLOUD:
(THE SIXTH GENERATION) Elizabeth (Betsy) (Betty) CLOUD (d/o William s/oJoseph , s/o Joseph , s/o William , s/o William )
Elizabeth CLOUD was born about 1780 in Henry Co., VA. She died 25 Aug 1865 in Grayson Co., VA. Elizabeth married on 5 Nov 1798 in Grayson Co., VA to William CARLAN Sr., son of Daniel CARLAN and his wife, Elizabeth. William CARLIN died 1 Jan 1815 in Norfolk, Norfolk Co., VA. William and Elizabeth had the following children: Thomas CARLAN, Washington CARLAN, Nancy CARLAN (married James GORDON), Martin CARLAN, Daniel CARLAN II, Hugh CARLAN, William CARLAN Jr
Also I found some South Carolina Archives information you may find interesting, keeping in mind that the boundaries of the state were quite different during the mid 1700's than they are present-day. (When researching the early colonies I always found it handy to have time-dated maps to study the changing boundaries.)
Note the use of the name CLOUD as in CLAUDS CREEK/CLOUDS CREEK which may be nothing important or could be another clue indicating possible connections of the NC, SC, GA, and FL Carlans to the CLOUD-CARLIN family in Virginia as mentioned above.
-- On 1753/9/14 John CARLIN filed a plat for 200 acres on the Little Saludy River
-- On 1755/02/12 John CARLIN had a grant of land for 200 acres on Clauds Creek (also found written as Clouds Creek in other entries).
-- On 1756/12/23, George CARLIN had a plat filed for 200 acres in Berkely County (other place names found in the description are Saxe-Gotha Township, Beaver Creek and Santee River)
My research time has been limited of late, but I do hope I can persue this with your help.