In one of the really old Smackdown games, in the Create-A-Wrestler mode, there was a suit of armour which I thought was awesome at the time (The hands turned into drills when you pointed! :D ) so I promptly equipped it. Lacking originality, I chose the name Armour. For some reason, I liked Armour, so I kept the character throughout every game I played that had Create-A-Character in it.
Meado is just a random Jedi/Sith name I came up with (originally Me'Ado) for a reason I can't quite remember now. In a (much) later game I needed a second name for Armour. Me'Ado randomly popped into my head, so I took it. It stuck with him.
Coincidentally, I've recently found out Meado means 'middle' in Portuguese, and 'pissed' in Spanish. Laugh at will.