I took a look, and I can't tell anything from your Cardozas. There isn't anything that could help me link. As a matter of fact, Cardosa appears as a "middle name" in my line, not a surname. I find some of the most confusing things about this research are that surnames didn't seem terribly important and could change for no apparent reason, the women didn't carry surnames at all, and there could be five men in one village with the exact same name. It doesn't make this easy at all. If you find a link in your research, let me know, and I will do the same.