Here is what I have come up with re the given names you noted.
George Martin
Robert Seay Enlisted as a Private in: VA Lynchburg Light Artillery
The American Civil War Research Database records him in the Lynchburg Light Artillery, did not survive the war. Their roster included a Captain Marcellus Newton Moorman in Shoemaker's Company, Virginia Horse Artillery (Beauregard Rifles) (Lynchburg Beauregards). I cannot locate a Seay in the records in the latter organization, nor can I find a roster for the Lyncburg LA
........................
Private R. D. Seay, age 24, enlisted in Captain Gilbert V. Rambaut's Company, Virginia Volunteers**, April 18, 1862 at Suffolk, under remarks "(Co A) 14th Reg't Tenn out 23 April. Bounty paid by Lieut Baptist" His name does not appear in the roster of the 14th Tennessee.
**Subsequently became Company C, 18th Virginia Heavy Artillery Battalion
.......................
Robert L. Seay, age 18, conscript, Enlisted as a Private in "F" Co. VA 2nd Bn Loc Def Infantry at Richmond, n.d., deserted October 22,1863 Laborer employed by J. R. Anderson & Co., captured, October 24, 1864, swore oath of allegiance to the US at Bermuda Hundred, Va. October 1864, sent to Philadelphia, Pa November 12, 1864, paid at Tredegar Works 19 days for the month of October 1864 on December 16, 1864,
.......................
Private Robert Seay, enlisted in Captain Van R. Otey's Company**, Public Guard for the city of Lynchburg, Virginia February 4, 1862 at Lynchburg, transferred to C. S.Navy February 6, 1864
**Subsequently known as Captain R. T. Brosher's Company, Public Guard for the city of Lynchburg, Va., Local Defense Troops
...........................
Private Robert L. Seay, enlisted in Company E, 2nd Virginia Artillery January 21, 1862 at Drakes Branch, this regiment was broken up about May 23,1862 and Company E was reorganized into the 22nd Virginia Infantry Battalion
............................
Private Robert L. Seay, Student, age 17, born in Henrico County, enlisted as a Private into Company E, 25th Virginia Infantry Battalion (Richmond Battalion, Infantry; City Battalion, Infantry) August 12, 1862 at Richmond for a period of 6 months, discharged January 30, 1863
......................
Private Peter Seay, age 18, enlisted in Captain George S. Davidson's Company**, Virginia Artillery, on April 14, 1862 at Lynchburg, Virginia for "The War," hospitalized at General Hospital, Liberty, Virginia January 1864, deserted at Greenville, East Tennessee April 1864,
**This company was know at various times as Captain Davidson's Company Virginia Artillery, Captain Chamberlayne's Company and Company C, 13th Virginia Light Artillery
........................
Private Isaac Seay, enlisted July 3, 1861 at Manassas in Company H, 11th Virginia Infantry, discharged at Lynchburg February 17, 1862, enlisted, age 44, April 14, 1862 in Captain George S. Davidson's Company**, Virginia Artillery at Lynchburg, Virginia, surrendered by General R. E. Lee, paroled at Lynchburg, Virginia April 13, 1865
**This company was know at various times as Captain Davidson's Company Virginia Artillery, Captain Chamberlayne's Company and Company C, 13th Virginia Light Artillery
born in 1818 (Personal Wealth in 1860, $30.00. Wife A. Seay, (b. 1818) 7 Children.)
......................
Private Jas. S. Seay, enlisted October 11, 1864 into Company C, 13th Virginia Artillery Battalion at Petersburg, paroled at Appomattox Court House, Virginia, April 9, 1865
.......................
Private Daniel Seal, enlisted in Company E, 1st Virginia Infantry Battalion on February 24, 1862 at Lexington, Virginia, deserted late 1863
...................
Private Daniel B. Seay, 15 year old Farmer, enlisted May 6, 1862 at Lovingston, Nelson County, Virginia in Company E, 51st Virginia Infantry, discharged for disability July 1, 1862 due to feeble constitution, born in Nelson County, VA
..................
Private Alexander Booker Seay, born in Amelia County, enlisted in Captain Robert C. Standard's (3rd) Company, Howitzer Battalion, Light Artillery** July 18, 1861, at Yorktown, Virginia, detailed as Regimental Commissary Sergeant July 4, 1862, in 1863 detailed as Adjutant with Major Moseley's Artillery Battalion at Petersburg, later at Kinston, North Carolina, admitted to Confederate States Hospital, Petersburg June 18, 1864, gunshot wound right lung, died June 21, father Samuel R. Seay filed claim for his effects September 1864,
**Subsequently served as Company D, 1st Battalion, Virginia Light Artillery
......................
Private Alexander R. Seay, age 16, enrolled in Captain Josiah Faulkner's Company (Howardsville Greys) 19th Regiment, Virginia Volunteers** at Howardsville, killed in battle near Richmond (Frazier's Farm), June 30,1862, father Jas. H. Seay filed for his effects August 4,1863,
**Subsequently became Company D, 19th Virginia Infantry