Isabel de Tolosa Cortés de Moctezuma

Background and marriage

Dona Isabel was a castiza of mixed Basque, Spanish and Aztec Indian ancestry, born in Mexico City, New Spain in 1568, a daughter of Spanish-born Basque Juan de Tolosa and Leonor Cortés Moctezuma. Her mother was the illegitimate daughter of Spanish explorer and conqueror of Mexico, Hernán Cortés by his mistress Tecuichpotzin (baptised Isabel), the eldest daughter of Aztec Emperor Moctezuma II.

Isabel's father was a wealthy Basque mine owner who had discovered the silver mines at Zacatecas in 1546. She had a brother, Juan, and several sisters; one of whom was Leonor de Tolosa Cortés de Moctezuma who married Cristobal de Zaldivar, and others who were nuns in Seville, Spain.

In 1588 in Panuco, Zacatecas, Isabel married Don Juan de Oñate, a Mexican of Spanish Basque ancestry and a noted Indian fighter in New Spain. This marriage to the wealthy Isabel, gave him much prestige. Together they had a son and daughter:

In 1595, Isabel's husband was ordered by King Philip II of Spain to colonise the upper Rio Grande valley. Isabel remained behind in Zacatecas when her husband led the expedition in 1598 to what is now the state of New Mexico, and founded the first Spanish settlement in the region. Her son, Cristobal, aged about nine, accompanied his father. Her husband claimed all of New Mexico beyond the Rio Grande for Spain, and was the first colonial governor in the New Spain province of Santa Fe de Nuevo México; however, in 1608 their son Cristobal actually became the first elected governor.

Isabel died on an unknown date in about 1619 or 1620 at Panuco, Zacatecas. Her husband died in 1626 in Spain.