So earlier today I had sort of an idea played in my head and then it got serious. It was a simple thought; why does Garon remind me so much of Ganondorf from Legend of Zelda. If your not familiar with LoZ (I've met hardcore gamers who don't know much about LoZ) Ganon is a dark wizard who is perceived by chosen oracles known as Sages or the warriors of the triforce goddesses (Farore=courage, Din=power, Nayru=wisdom) who chose to embed their gifts into, as an evil omen. No seriously all the townsfolk almost never mention Ganon, only the things hes done and to that they don't even know if he did it. The three warriors are always set in a certain time (or dimension) and events seem to always revolve around, if not in, the kingdom of Hyrule.
So I was in the shower and suddenly I was making comparisons about the two kings. Garon as we know uses faceless to fight for him which are basically undead. Either that or he has Leo do it for him, but something makes me think he can summon them himself since a lot of his subordinates can. Ganon summons redeads to guard his castle and if you look at a redead upclose he looks a bit like a faceless just not as much muscle and crazy mask... Anyway Ganon sends out minions and guardians to stop Link the main protagonist, so does Garon with his subordinates. In some of LoZ's dialog some of Ganon's minions actually don't like fighting for him or are fed up with Ganon's reign but know they will die or be destroyed if they don't comply. Same lies true with Garon.
There's a lot more comparisons to the two but I don't want to bombard you with a wall of text. But hey last thought, this wouldn't be the first time Fire Emblem had a play on names.