The best thing for you to do is follow the link to Muertito Heaven as elpadre suggested and check on all the Pabón lines there. Check with your eldest living Pabón relative concerning names and surnames they remember. Without both surnames for your paternal and maternal grandfathers and grandmothers it is difficult for anyone to help. By the way, we are also descenants of Juan Valerio Clas born c. 1778. Class is also found as Clas, Classen, Klausen, Klassen. That line is also on the site. Our de Rivera had a huge descendancy. Check that out too.