don't like something? fix it. stop complaining about it.
Nope, those are the only times that N's last name are mentioned, though Sage Ryoku doesn't even think they're related.
"N Harmonia". So something like "enharmonia", then?
Damn, that's not a word.
The word "quadragonal" is the only word with "dragon" in it where "dragon" is not a root word. That makes it awesome.
Also the Concordia is essentially the Roman goddess of harmony and Anthea is an epithet for Hera, a goddess of marriage--the union of man and woman. Random NPC dialogue where an NPC muses relation between people and Pokemon even make a comment on how "men" and "women" are the farthest opposites from each other (apparently) yet get along so well.
And therein lies the irony of the Harmonia name...that N wants anything but harmony.
Ghetsis' name is also a musical reference, so 'Harmonia' could have multiple layers of meaning to it.
Its an interesting name that im sure will make more sense when 3rd game is released. Didnt they say N's real name would be revealed then, I remember reading that.