Available Emblems of Belief for Placement on Government Headstones and Markers , An illustrated list from the US Dept. of Veterans Affairs, has some suprisingly liberal allowances for various religions.
It seems like many of them are from religions people have converted to after their tours of military duty.
Can you honestly picture anyone from Ekinkar signing up for a four year hitch?
And that Atheist symbol looks like something that race of radiation scarred mutants that worshiped the bomb used in Beneath the Planet of the Apes.
Check Arlington National Cemetary for your favorites.
"No graphics (logos, symbols, etc.) are permitted on Government-furnished headstones or markers other than the approved emblems of belief, the Civil War Union Shield, the Civil War Confederate Southern Cross of Honor, and the Medal of Honor insignias."- site disclaimer