Hi Victor, I m sorry for the delay. The source used, was a web page called: FAMILIAS VINCULADAS A NUESTRO APELLIDO POR MAS DE DOS GENERACIONES http://roberto-yrausquin.tripod.com/familias_vinculadas_por_mas_de_... - You will find interesting information there. Maybe that questione should be answer by Roberto Yrausquin , the person I think wrote the blog/website. It would be interesing to know. Cheers. M