Re: A name...
Probably not what you're looking for. But Evascillon can translate as "The Chief Fool of God" in Hebrew. Fool in this case not carrying the "romantic" notions of Jesters or the Tarot trump, but Fool as in utter idiot.
Anyways, it does sound Angelic, but On is one of the Names YaHooWaHoo stole when taking over the Middle East, and it appears in several Angelic Names, so there is at least a reason what it pinged you as such.
If it's a real name (i.e. not glossolalia), freelanceangel may be on the right track, and you should compare it to other Angel Names. Specifically changing soft sounds, vowels and some consonants. Well ignore vowels when dealing with Names usually, but in this case, V-B, S-Sh, C-K-Q-Ch are common substitutions or drifts to consider.
When we first begin all things simply are.
As we grow all things are external.
As we learn all things are internal.
As we understand all things are not.