There may be something here that may or may not be of help to you, but I surely hope you have info on his middle name or middle initial, at least. As you can see there are several listings for Roy Nash.
Note* People who died before the late 1960's are not listed in SSDI (Social Security Death Index), which most times is helpful in learning place and d.o.d. (date of death.)
2.NASH, ROY CLEVELAND PFCUS MARINE CORPS WORLD WAR II DATE OF BIRTH: 08/12/1916 DATE OF DEATH: 02/20/2006 BURIED AT: SECTION ISITE 278 KEOKUK NATIONAL CEMETERY 1701 J STREET KEOKUK, IA 52632 (319) 524-1304
3.NASH, ROY GEORGE SEAMAN 2ND CLASSUS NAVY DATE OF DEATH: 03/07/1937 BURIED AT: SECTION JSITE 10082 MARIETTA NATIONAL CEMETERY C/O GEORGIA NATIONAL CEMETERY 2025 MOUNT CARMEL CHURCH LANE CANTON, GA 30114 (770) 428-3258
5.NASH, ROY LEE SGTUS AIR FORCE DATE OF BIRTH: 03/16/1928 DATE OF DEATH: 11/24/1993 BURIED AT: SECTION 1CSITE 1695 JEFFERSON BARRACKS NATIONAL CEMETERY 2900 SHERIDAN ROAD ST. LOUIS, MO 63125 (314) 845-8320
6.NASH, ROY LEE PFCUS ARMY KOREA DATE OF BIRTH: 03/28/1928 DATE OF DEATH: 07/28/2006 BURIED AT: SECTION 1BBSITE 1314 JEFFERSON BARRACKS NATIONAL CEMETERY 2900 SHERIDAN ROAD ST. LOUIS, MO 63125 (314) 845-8320
7.NASH, ROY MYRTH S1US NAVY WORLD WAR II DATE OF BIRTH: 12/26/1926 DATE OF DEATH: 09/06/1994 BURIED AT: SECTION G2SITE 1029 HOUSTON NATIONAL CEMETERY 10410 VETERANS MEMORIAL DRIVE HOUSTON, TX 77038 (281) 447-8686