For clarity, the 'Mech is spelled Man O' War, but the band is just Manowar.
There is the mercenary unit The Metallicon, which I think is a reference to some band or another, maybe Jethro Tull.
And while I am disappointed in BattleTech writers (including myself) over the lack of some kind of unit named Therion, I do not hold my breath for a Toad the Wet Sprocket OmniMech.