Need some help from the erudite and learned on this august board. What are the meanings of these symbols?

http://starwars.wikia.com/wiki/File:Rebel_helmet_symbol_4.svg

http://starwars.wikia.com/wiki/File:Rebel_helmet_symbol_5.svg

http://starwars.wikia.com/wiki/File:Rebel_helmet_symbol_2.svg

Tried to post the actual images, and I got this message: You are not allowed to use that image extension on this community.

I am working on creating a custom logo for an XW Squad at my local FLGS and want to know what they symbolize so that I can decide on whether or not to include these symbols in the squadron crest/insignia I am designing.

In the OT for the rebels, helmet symbols didn't seem to have a direct meaning, so likely meant more to the individual pilot. This makes sense as there were a good few different helmet styles in Red squadron alone.

What DariousAPB said.

It may be linkages back to their home planet (their state flag, logo of their favourite football team or band, etc). Could even just be what was on the helmet when it was given to them.

So I would argue the only real meaning behind those symbols was exclusive to the individual pilot.