Not that straightforwardly. 'Izunia' means roughly 'of the stars' in a language of the Tenebraean region that hasn't been spoken in over a thousand years. 'Ardyn' means 'burning' or sometimes 'passionate,' in the language you know as Ancient Lucian. Thus, the burning light of the sky - the sun, tinted red, as it dips below the horizon - and the light of the stars that follows.

[His chuckle is a little forced.]

I still find Noctis' name more ironic than not, but at least Regis had a better sense of aesthetic than the generations immediately before him.