'Elegabalus' is the hellenized or Romanized form of the semitic name, which would not have had the '-us' at the end: it would be more like El-Ege-Bal or El-Ege-Pal or something. One might say that Decebalus is also Romanized, yet: there is a possible Dacian inscription (is it authentic?) from Sarmizegetusa that has the '-Balus' form. Decebalus, if Romanized, might be a Romanization of Decebalos. The similarity of Dacian '-balus' to semitic 'bal/baal' is surely a coincidence, and not an extreme coincidence at all. There was a Gaulish god of fire and of the sun named 'Beli', which is similar in name to Babylonian 'Bel'.