<Tr> <Th> U.S. DoD Pay grade </Th> <Th> E-1 </Th> <Th> E-2 </Th> <Th> E-3 </Th> <Th> E-4 </Th> <Th> E-5 </Th> <Th> E-6 </Th> <Th> E-7 </Th> <Th_colspan="2"> E-8 </Th> <Th_colspan="3"> E-9 </Th> </Tr> <Tr> <Td> Insignia </Td> <Td> No insignia </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Title </Td> <Td> Private </Td> <Td> Private First Class </Td> <Td> Lance Corporal </Td> <Td> Corporal </Td> <Td> Sergeant </Td> <Td> Staff Sergeant </Td> <Td> Gunnery Sergeant </Td> <Td> Master Sergeant </Td> <Td> First Sergeant </Td> <Td> Master Gunnery Sergeant </Td> <Td> Sergeant Major </Td> <Td> Sergeant Major of the Marine Corps </Td> </Tr> <Tr> <Td> Abbreviation </Td> <Td> Pvt </Td> <Td> PFC </Td> <Td> LCpl </Td> <Td> Cpl </Td> <Td> Sgt </Td> <Td> SSgt </Td> <Td> GySgt </Td> <Td> MSgt </Td> <Td> 1stSgt </Td> <Td> MGySgt </Td> <Td> SgtMaj </Td> <Td> SMMC </Td> <Td> </Td> </Tr>

Where did the marine corps name come from