Ethnic composition based on paper trails

[Colonel Frank Grimes]

At least you are realistic. Do you know how many times I said to RMayan that surnames among Latinos mean little, since your ancestors adopted the surnames of their European masters?? yet he thought he was Basque due his surname

This is inaccurate (as is typical of most things CV says). If you're Mestizo, of which a bulk of the Mexican population is, you would have the surname of an actual ancestor.