The town of Asaru

I do have a conjecture about the Asaro from central Sicily, the area around Canicattì and Caltanissetta. If we look at a detailed map of Sicily, around 40km east of Caltanissetta we may notice a very small town, called home by slightly more than 5,000 people, but with a very long history: Assoro. In Greek it was called Assoros, but in Latin that was rendered as Asarus, and in Sicilian it is still called Asaru to this day. I think there may be a decent chance that the Asaro from central Sicily got their surname from that town. That is even more likely for the D'Asaro family, as they are indeed more prevalent in central Sicily than in Western Sicily, and D'Asaro could well mean both "from the Asaro family" and "from the town of Asaro". Having said that, I am not sure how well this conjecture could explain the higher prevalence of the Asaro in western Sicily (Mazara, Castellammare, ..), whose men are almost always sailors or fishermen. It is not impossible, but I sort of find hard to believe that some guy from a town on the top of a mountain in central Sicily may be the forebear of such a family of seamen :) It may well be that the western Asaro and the central Asaro and D'Asaro may just share the surname, but not the forebear.