You can now review the results of Casillas from los Altos/Jalisco and world wide. We are Celtic-P Britonian. www.ysearch.org. (the Barba family from los Altos is also from the same line of people)
Our ancestores came from the Netherlands and crossed over to Britain. Primarily east and south Britian.
Some time during the REconquest of Spain against the moors, large number of Christians moved South to join the recolonization efforts. The Casillas last lived in Almendralejo Extramadura Espana.
From there we went to Mexio.
Our paternal DNA HAPLOGROUP is R1b1c9. Please look it up on the internet for details, search Haplogroup r1b1c9. If you think your name is not Casillas but you adopted the name feel free to take a DNA test.
The Viceroy Mendoza was also our relative as is Miguel Hidalogo Hermosillo, Florida, 2000 years ago John/Samuel Adams, the Mabra family, the Mayberry Family, the Costello family on and on.
My grandfather always told us that we were descendand from "white spainards" now the DNA evidence proves it.
We are not sephardic/arab we are Western Europeans who moved to Mexico during the colonial peroid. Please contact me if you have any questions.