By now maybe you don't need answers, anyway I just saw your post. At sephardim.com they have MEDINA and similar names, along with the data base references. When you do go to sephardim, or avotaynu sites, you need to scroll way down for their actual names search engine. The search engines at the top is ancestry.com
Medina de(7)(13)(15)(18)(23)(31/4/12) MEDINA Rico de(13)
Medina y Merida(6a) MEDINA(*)(2)(3)(6a)(11)(14)(23)(27)(29)(30)(37) Medina-Aluf(31/2/5)