Don Nicolas Sierra,
One of my Great-grandfather's brothers, Jose Martin Sierra was Baptized in San Elizario, TX on 5 Nov 1845. Martin died in Las Cruces, NM. Another brother, Mariano Sierra married Mariana Cortes on 28 May 1877 in Socorro, TX. My Great-grandfather was Jose Teofilo Sierra, birth or death dates unknown, his 1st wife(my great-grandmother) was Epifania Benavides and his 2nd wife was Manuela Nevarez. They lived in La Mesa, NM. He also had a daughter by a 3rd woman named Maria de Jesus Rubio. There was also a sister named Jesus Sierra who married Cruz Padia in La Mesilla, NM. She died in 1880 in Socorro, TX. My Great-great-grandparents were Hilario Sierra and Maria Dolores Sambrano. Hilario's parents were Jose Maria Sierra and Eusebia Guerra. Do any of these names match those in your arbol genealogico?