My late mother, Romana Ruffina Fierro Glotzer, was born in Terlingua Texas in 1918. My grandfather's name was Esteban Fierro, who was from Delicias. I believe Esteban Fierro had some siblings, one of who was "Lalo", short for Laureano.
Esteban Fierro supposedly went off to fight with Pancho Villa when my mom and my tia Anita, but in any event, Esteban never came back. My abuela, Manuela Lozano Fierro, remarried to Manuel Pena, and the family moved to El Paso at some point.
My tia Anita is in her nineties now, and she does not remember much of anything. Does any of this ring a bell?
Robert H. Glotzer (Y Fierro)
PS: I have seen the Wikipedia picture of Rodolfo Fierro, and he looks like me when I was in my thirties, and still had a lot of hair!