Hello. That's great that you are descended from Amos! Brent Holcomb deals with Amos's family of origin in his 1985 book "Ancestors and Descendants of Charles Humphries (d. 1837) of Union District, South Carolina 1677-1984." This book may be found in many libraries. On page 4 Mr. Holcomb shows a birth date of 27 December 1749 for Charles's son John (Amos's father). I believe this comes from a family Bible housed in a local archive in SC, so it is pretty certain (see also p.11) . John was almost certainly born in Virginia--his father lived there until 1765. Charles moved to Johnston Co., NC about then and lived on land purchased from his brother William. John would have been about 16 then so probably traveled to NC with his family when they moved there. Charles moved on to Chester Co., SC in 1779, but son John may have moved there before him. As a note, Charles, the father, was probably not born as early as 1715. That was just a guess by an early author. Charles appears to be the youngest of four sons of John and Mary White Humphries who were bequeathed a piece of property in their father's will of 1738. The land was on Allen's Creek in Brunswick County, Va. It appears the brothers waited until Charles came of age to sell the land (probably so they didn't have to deal with their mother and step-father in selling it). If Charles was at least 21 in 1747 when the brothers sold some of the land, that puts his birth at about 1726. Holcomb notes that there is no proof that Charles's wife was Mary Bennett. They named a son Bennett, so it could be true but is not proven. No connections with any Bennett families have been established to date. John Humphries's family Bible shows his wife's name to be Elizabeth Timms, rather than Thomas. Some histories state that Elizabeth's family came from "across the waters," but if they did, it was a long time before Elizabeth's day since there is evidence that the Timms and Humphries families interacted for two and possibly three generations before John and Elizabeth married. The information that you have about John and Elizabeth's children seems to match what is shown on page 11 of Holcomb's book. I think something is known about all of the children except for David. Wish someone knew or would tell what happened to him! There are still some mysteries about this family that might be solved with further research.