I am not related to this family, but noticed this name in a book I have "Beginning at a White Oak" by Beth Mitchell, which is about patents and northern neck grants in Virginia.
A James Brechin owned land there as early as 1716. One of the tracts was 795 acres, 20 December 1716.Book NN56;44."About two miles below the falls of the Potomac adjacent Thomas Going.""James "Brechin of St. Paul's Parish, Hanover County, son of James Brechin of the grant, sold for 25 pounds one half of this tract, or 397 1/2 acres adjacent Thomas Going's land, now Col. Mason's orphans, to Daniel Jennings of Cople Parish, Westmoreland County.(Pr. Wm. Deeds D:216)
"Brechin, James, 578 acres, 28 Dec 1716, Book NN 5:30 - On a branch of Long Branch of Accotink."
There are quite a few other listings for this man.
The book is possibly still available from the Map & Publications Sales in Fairfax Co., VA - 703-246-2975.