To alll those who are doing genealogy and looking up information about relatives that had this last name and haven't found any information. Start looking on the Italian webpages, most people don't know that this isn't a Spaniard last name. The Spaniard version of this name is spelled Collaso. I was able to find my family because of this. Many different groups of Europeans traveled to the New World during the 1500's all the way through the 1900's, thus many people of latin heritage have last names that aren't Spaniard. Happy searching :) And remember we all had to come from somewhere..............