There is (or was) a very large Diaz family in Pinar del Rio. Check a small town call Punta de la Sierra. Family that i knew there were Segundo Diaz and all of his children, Maria Diaz, Tomasa Diaz. They had tobacco plantations right on top of the Sierra and on Oct 03, 1956 (year might be wrong) they built a small church "Santa Teresa, righ there. I can remember much because i was very young but my mother that came to Havana as a very young child was related to the Diaz. Also ck the church in Pinar were they were all baptized. I wish I could be of any help but I though i could give you some hints. Most of these descendants were living in Miami, if they are alive. What I can tell you is that Punta de la Sierra is a beautiful place at the end of the Cordillera de los Organos, Regards, Georgina Zayas, Miami