Capitán don Alonso de Sosa Albornoz enlisted as a soldier in the army of don Juan de Oñate, passing muster on February 10, 1597, in the Valle de Pauna in the jurisdiction of Nombre de Dios. He declared he was a native of "Mexico" and a son of Francisco de Sosa Albornoz. In his company was his wife and five children (Hammond and Rey: 165).

Information recorded in 1635 (Mexico City) and 1651 (Mexico City) by a son of don Alonso de Sosa Albornoz combined with additional information recorded in 1667 by a grandson and the 1540 record of passage of don Franciso de Sosa Albornoz provides a valuable account of the lineage of the Sosa Albornoz family, which originated in the region of Toledo, Spain:

Notes for CAPTAIN ALONSO DE SOSA-ALBORNOZ:
Murder of a Member of the 1598 New Mexico Expedition

A native of New Spain, Captain Alonso Sosa Albornoz, one of the founders of the mines at San Martin,
was born in 1550 at Xochitla, New Spain (Mexico). He was the son of Don Francisco de Sosa Albornoz and Dona Inés de Tapia and a descendent of the Royal Treasurer of New Spain, Don Alonso de Estrada.

He was married twice. His first marriage occurred in 1565 to Dona Juana Ramirez, a native of New Spain, and born about 1550. After the death of his first wife, Captain Alonso married the Dona Beatris Navarro Rodriguez. This marriage took place on or about 1589 in Mexico City. Dona Beatris was much younger than her husband, having been born in 1564. She was the daughter of Don Juan Navarro and Dona Maria Rodriguez

Captain Alonso is listed on the January 8, 1598 muster of the officials and soldiers who enlisted in the Valley of La Puana for Governor Don Juan de Onate's expedition into New Mexico. On the muster, his belongings included a servant, harquebus (a early type of portable gun supported on a hooked staff), and complete armor plate for himself and his horse. Also in this expedition was his wife Dona Beatriz and their five children. It is possable that his children from his previous marriage may have also accompanied him. By the time of this expedition these children would have been older than eighteen years and could have gone their separate ways.

As one of New Mexico's first settlers, he would be executed for requesting to be transfer back to New Spain. This settlement was located in the far frontier of Spain's vast Empire. Finding itself removed from all civilization, this harsh land was rendering the settlers to extreme hardships. Not wanting to endure any further hardship, Captain Alonso asked for permission to return his family to New Spain. At first his request had granted, but apparently to prevent a mutiny, the governor had second thoughts. It is recorded that Governor Juan de Oñate ordered Don Alonso's killing and in 1601, under the command of Don Vicente de Zaldivar, Captain Alonso was ambushed and killed.

After Don Alonso's death, and finding herself completely vulnerable in a hostile and remote environment, Dona Beatris would married a native of Tenerife, Canary Island, Spain, Captain Bernabe de las Casas. This marriage took place in New Mexico. This marriage provided her the security and protection for her and her five children. Her marriage to Bernabe would add five additional children.

Captain Alonso Sosa Albornoz and Dona Beatris Navarro Rodriguez had the following child: Ana Sosa Albornoz was born in Mexico around 1590. She married Alonso Farias Treviño in Nuevo León. He was the son of Don Juan Farias and Dona Maria de Treviño Quintanilla. There are many descendants of Captain Alonso who are the progeny of his daughter, Ana Sosa Albornoz.

A.K.A. Alonso Albornoz de Sosa and Alonso de Sosa Panalosa

Source: Agapito Rey and George Hammond, Don Juan de Oñate Colonizer of New México 1595 - 1628 (Coronado Historical Series: The University of New México Press, 1953); New México Historical Review The Founding of New México.
A History of New Mexico by Gaspar Perez de Villagra, Alcala - 1610, translated by Gilberto Espinosa.
In the book, Mil Familias III, by Rodolfo Gonzalez de la Garza, he is listed as a descendent of the Don Alonso of Estrada, Duke of Aragon. Page 85.
New Mexico's First Colonists, compiled and arranged by David H. Snow.
Land of the Conquistador by Cleve Hallenbeck.