My abuela, Manuela Lozano Fierro (Later Pena), had a brother named Marcos Lozano. Marcos Lozano moved up to Chicago, where he worked for International Harvester - a good job at that time. He married an Italian woman named Mary Fernino (Spelling?)
Marcos Lozano died in a motor vehicle accident around 1954 or so, when he was struck by a truck. I believe he had a brother named "Lalo", which I think was short for Laureano. He may have also had another brother named Candelario.
I downloaded a page of Mexican census records that show an Esteban Fierro living near Delicias Ch. around 1930, and he looks about the right age. I will have it scanned to a disk and send it to you.
We should done the Fierro family research a long time ago!
Robert H. Glotzer y Fierro