Other Forms FormsBravlio, Bravilio
Apparently derived from Germanic brahuila meaning "bright, radiant" - with one source saying that it is etymologically related to Old High German brand or brant "sword". However, I am not sure how much stock should be put into that, since it seems like its pronunciation would be akin to brilla (BREEL-lah), which makes it look suspiciously close to the Italian verb brillare "to shine, to sparkle" and ultimately comes from berillus, a latinized form of Greek beryllos. Perhaps Germanic peoples did adopt this Latinate-Greek word into their own language as brahuila? Pretty much all sources agree that the name of Bruilio originated in (Visigothic) Spain, so it could indeed be possible that in Germanic Spain of that time a foreign word from neighbouring (mostly Latinate) countries was adopted and germanized. A notable bearer was Braulio of Zaragoza, a (Visigothic-)Spanish saint from the 7th century AD.