I put out a call on Facebook for suggestions on Gaelic mythology to read. This was the top suggestion.
This strongly reminded me of Norse and Saxon epics. All account for the names of places by describing the battles undertaken there. Each is more fantastic than the next.
This one follows Cúchulainn, the Hound of Ulster. He battles against the armies of queen Medb. He can stun dozens of swans with a single throw of a stone. Or use thrown spears as stepping stones. You know... The kind of stuff one would see in an ancient China martial arts movie such as "Crouching Tiger, Hidden Dragon." Which reminds me, there MUST be a movie about this epic, right?