I was just busy reading Hamlet for a school assignment, and I came across an interesting word, the last one in line 500, Act 2, Scene 2. It was "Illium". This struck me as remarkably similar to "Illeum", which had plains before it, on which a Leveller was drawn and quartered. Since this is an annotated version of Hamlet, I looked at the facing page and lo and behold, there's a definition of Illium. It was the fortress within Troy.
So, Troy is (was) in the Myth world? Or did Bungie just like the name, and used it like so many others (the fir'Bolg, Balor, Connacht, Clovis, etc).
Also, in that same passage is a mention of Pyhrrus. Wasn't there some historical reference to Pyhrrus and Clovis in an early Pathways Into Darkness plot?