Not always the case.
Rangel may be a slightly different Mexican surname, but not quite as easy to find in records and files.
It all depends on spelling and who transcribed the record and so forth, and if the ancestor knew how to spell to begin with.
Which leads me to this most common name currently in my family: Francisco Perez. Upon during research in Ancestry.com, there are numerous amounts of Mexican men with that name which make it all the more difficult to determine which one is the correct one.
The question here now is, how is it actually spelled? Perez? Peres?
Be careful my fellow hunters and gatherers of information. There are many leads that can take you down the wrong road to bad information.
And the hunt goes on for Fransicsco Peres. (Spelled incorrectly on purpose).