YES. James Seaton who married Mary Clark was the oldest of James Seaton and Elizabeth Kenner children. Sources for James Seaton (m. Mary Clark):RECORD:

1. Leckey, Howard L, The Ten Mile Country & Its Pioneer Families, The Bookmark, Knightstown, Ind., 1977, p. 514, fiche 6049273 or 974.88 H2lc 1977.

2. Brown, H. Andrew, History of the Browns/Brauns--Gaffney Families of Northeast Iowa, Los Angeles: 20 Dec 1987, p. 190 A-B, Film 132071 and pamphlet.

3. NSSAR - Sons of the American Revolution , Member's Application Forms, SAR file reference #28531, NSSAR, 1000 South Fourth Street, Louisville KY 40203.
James Seaton, Company Clerk, Third Company, First Battalion, Pennsylvania Militia, 1781-1782; Washington County, Pennsylvania Militia.

4. Bookstrop, Lloyd DeWitt., Virginia's Colonial Soldiers, Baltimore, 1988, page 139, CD 503 or Genealogy.com On-Line.
Lord Dunmore's War, James Seaton on Capt. William Hancher's Roll at Romney and Winchester.

5. Montgomery, Thomas Lynch, Pennsylvania Archives, Sixth Series, Vol. II, Harrisburg Publishing Co., Harrisburg, PA, 1906, Volume 2, pages 165, 171.
Revolutionary War.

6. Hennen, Dorothy T, Cemetery Records of Greene County, Pennsylvania, D. T. Hennen, Waynesburg, Pennsylvania, 1993, Volume 2, page 121, 974.883 V3h v. 1-13, Fiche 6987932-36, 6038345.
Tax records for Cumberland Township: 1798 Francis Seaton, distiller and mark indicating he was on the 1800 census along with James Seaton and William Seaton, Esq., tavern keeper.

7. Registrar & Recorder, copy March 2002, "Will of James Seaton", Estate File #650 1/2 contains Original Will and cursive writing copy; date and author of source undated, Greene County Courthouse, 10 East High Street, Waynesburg PA 15370.

8. Jackson, Ronald Vern, 1800 Census Pennsylvania, Volume One A-K, Volume Two L-M, Accelerated Indexing Systems, Salt Lake City, Utah, 1972, Volume Two, page 1407.
Seaton, James Green County, Penn, page 55, 20101-01101-10.

9. National Archives, 1810 Census, Pennsylvania, Ancestry.com Online, Greene County, page 57, Cumberland Township.
James Seaton, George, James, Wm., and Francis Seaton--photocopy of original.

10. 1820 Census, Pennsylvania, Volume 3, The National Archives, General Services Administration, Last page of Greene County, Film 181404.
Photocopy of original, first part of given name obscurred, James Seaton with one person in household. Son James Seaton at end of Cumberland Township, last page with five in household.

11. Jackson, Ronald Vern and Gary Ronald Teeples, 1820 Pennsylvania Census Index, Accelerated Indexing Systems, Inc., Bountiful, Utah 1978, page 315.
James Seaton Greene County 355 Cumberland Twp; son James page 338, both identified in original census forms.

12. "James Seaton 1778 Will & 1787 Probate Accounts", File S 8 1787, Register of Wills, Washington County Court House, Washington, PA 15301-4402.
Named with mother as Executor of his father's will plus tract of land where his father lived and purchased from Rich. Chenoweth with one Negro boy named Joseph, (but to pay 100 pounds out of it to estate for the use hereafter mentioned . . . .

13. Bell, Raymond M., Dr. , "Unlisted Estate Papers," The Raymond M. Bell Anthology, http:www.chartiers.com/raybell/1987-estate.html.
James Seaton (son) "the land whereon I now live" - bought from Richard Chenoweth . . . .

14. Montgomery, Thomas Lynch, Pennsylvania Archives, Sixth Series, Vol. II, Harrisburg Publishing Co., Harrisburg, PA, 1906, Muster Rolls, Washington County, page 165, 171.
James Seaton, Clerk in Captain Crawford's Compy of Militia, Dist. upon the Monongalia River between Whiteley and Muddy Creek Oct 1781.

15. National Archives, 1790 Census Pennsylvania, Washington County, Ancestry.com Online, page 248, no township.
James Seaton, head of family. Greene County formed before 1800 from Washington County. One male 16 or older, 4 males under 16, 2 white females including head, and 7 slaves. Brother Francis Seaton and mother Elizabeth in same county.

16. 1800 Census, Pennsylvania, Ancestry.com, Online.

17. National Archives, 1800 Census, Pennsylvania, Ancestry.com Online, Greene County, Cumberland Twp, page 55, Ancestry.com, Online.
Seaton, James, males: two under 10, one 16-25, one 45+; females one age 10-16, one female age 16-26, one over 45, one slave.

18. Sullivan, Mrs. William Henry, Diamond Jubilee Administration, DAR Patriot Index, National Society of the Daughters of the American Revolution, Washington, 1966, page 601.
James b. 7-19-1751 d. 3-2-1830 m. Mary Clark CS PA.

19. NSDAR - National Society Daughters of the American Revolution, Record Copy Application File, #1888378, Luella Hartley Teal, Office of the Registrar General, National Society Daughters American Revolution, 1776 D Street NW, Washington DC 20006-5303.
Through George Clark Seaton, son of James Seaton and Mary Clark. Cites source Family Record of James Seaton in hands of Mrs. Elizabeth Robertson /dau. Mrs. Victor Richey at Garards Fort, Greene County, Pennsylania (1948).

BIRTH:

20. Katheder, Thomas, "Seaton of Fauquier County, Virginia,", The Virginia Genealogist,John Frederick Dorman, Box Falmouth, Virginia: quarterly, April-June 2000, page 85.

DEATH:

21. Katheder, Thomas, "Seaton of Fauquier County, Virginia,", The Virginia Genealogist,John Frederick Dorman, Box Falmouth, Virginia: quarterly, April-June 2000, Vol 44, Nr 2, Ap-Jun 2000, Katheder, Thomas. "Seaton of Fauquier County, Virginia," p. 89.

BURIAL:

22. NSSAR - Sons of the American Revolution , Member's Application Forms, Family Group Record and Notes; @083576, SAR Ref #28533, NSSAR, 1000 South Fourth Street, Louisville KY 40203.
Burial: Old Seaton Cemetery, Ceylon, Pennsylvania.