[Jedi Master Pikachu]

Most are mixes of Amerindians and Spanish (though the north did have a larger Spanish component). Also, a lot of Basques emigrated to the Americas.

[Prost1]

I have met many who are predominately Jewish origin.

They are in the Rio Grande Matamoros area. A place where a general named Santa Anna was viceroy.

Just check the last names...I am not speaking of Basques.
Sheepherders are in San Angelo.