I don't know anything about these people.However, one of my books has a little information on an Edmonds family in the Warrenton area.I imagine that is a possibility also.One of my books "Beginning at A White Oak" by Beth Mitchell, has information on Patents and Northern Neck Grants of Fairfax Co., VA.Possibly some duplications of information from the book you mentioned.There are quite a few listings for Edward Emmbs in the index.This book is available from Maps & Publications Sales, The Massey Building, 4100 Chain Bridge Rd., Fairfax, VA22030.Phone (703) 246-2975.
One of the items, on page 160 - Edward Embs, William Harle & John Harle concerning 512 acres, 15 July 1731; NN C:206; Mill Run above Difficult (Run)."John Harle of Loudoun County, devisee of Edward Emms, now of full age, pursuant to order of General Court 14 October 1761 and at the request of Benjamin Sebastian of Fairfax County, sold to James Robertson one equal and undivided moiety of tract of 512 acres on Mill Branch (Loudoun Deeds C:589)."
"John Harle of Loudoun County sold to William Trammell for 200 pounds remining part of tract of 512 acres whereon William Holleyfield lived as a tenant to Edward Emms, less 200 acres excepted for Sampson Trammell, to be laid off for him as specified by bond from John Harle to Sampson Trammel. (Loudoun Deeds D:585, 9 September 1765."
Other listings mention land on Scotts Run, adjacent Parson Scott; Embs 300 acre tract "now Ellzey."Embs sold land to Alexander Scott (see the Scott forum for information on him that I entered today). He also sold land to John Colville; William Shortridge.
"In a 1776 dispute Gerrard Trammell testified that Emms was an excellent woodsman and that he could go to a tree in any part of the woods where he had been before and that he believed he was a very honest man. (LRLS, p. 254)."
One page mentions that James Thomas was a partner of Edward Emms.Another pages states "Edward Emms, who by last will devised to William Kincheloe, who with Mary his wife, sold to Samuel Littlejohn, 20 April 1772.(Fx Deeds L:273.18 May 1774)."(Possibly Mary was the daughter of Edward Emms).
I have copied the name the way it was spelled each time.There were no Emmons or Edmonds in the index for this book.If you find that you cannot purchase a copy of the book, I will try to enter the rest of the information, but there is quite a bit.I did not see any information on children, etc.