American Militia in the Frontier Wars 1790-1796, Clark p. 65 Kentucky Militia- Major General Scott's Command, Major Wm Russell's Battalion, Capt. Henry Lindsey's Company. Dated 1794 Cravalus Spiller, SGThorse lost onAugust 20 John Mulberryis also in this company.
I wonder if this was Craven Spiller who was listed in the 1787 & 1788 Property Tax lists of Stafford Co.
Then, too, you know there are at least 3 Philip Spiller's in Fauquier County. The first one died about 1761 and had 4 sons, any one of which could have had a son named Philip. The first Philip did have a son, Philip the preacher who died 1821. That Philip had a son Philip Jr. So, maybe your Philip was Philip the son of Philip the preacher and maybe he wasn't.
I've found a 45 yr+ Philip Spiller in 1820 in Montgomery, Ky beside Craven Spiller who is 16-26. This is in addition to the above mentioned Craven Spiller who is obviously older to have been paying property taxes in 1787 and then being in the militia in Ky in 1794. And I don't think he could be the father of Thomas Spiller whose mother Elizabeth married John Mulberry, because they married in 1792.
My point is, these Spiller's love to name their children for their relatives and it is very easy to assume they are the same people when maybe they are not.