The 1975 second draft refers to “Aquillian rangers” who protect the Rebel ship from the stormtroopers. Perhaps this was their official name at one point. (“Aquillian” comes from “Aquilae,” Leia’s home planet in the 1974 rough draft.)
If thats the case, then it seems all of the staff on hand for the closing ceremony in ANH were Alderaanians. I wonder where the rest of the rebel folks that were at the Yavin moon were? Working on the ships? Guard duty?