Hi Peter, Glad to hear you received your book. Chapa was from Italy,a town near Genoa. He shortened his name when he came to New Spain. He did marry into the Trevino family and the Renteria's. I just found out that my local library has a copy of Platt's two books. Imagine my surprise, I'll let you know how they are. You can E-mail me at firstname.lastname@example.org So I can answer your questions longer. I want to know more about what your exactly researching.