María Calvillo, descendent of early settlers of San Antonio and owner of Rancho de las Cabras in what is now Wilson County (see RANCHO DE LAS CABRAS STATE HISTORIC SITE), was born at the Villa of San Fernando de Béxar (San Antonio) on July 9, 1765, the eldest of six children born to Ygnacio Francisco Xavier Calvillo and Antonia de Arocha. Her father acquired Rancho de las Cabras ("the Goat Ranch"),an outpost of San Francisco de la Espada Mission, after the mission and its lands were secularized. María Calvillo married Juan Gavino de la Trinidad Delgado around 1781. The couple had two sons, Juan Bautista and José Anacleto, and adopted three additional children, Juan José, María Concepción Gortari, and Antonio Durán. During the 1811 and 1814 Gavino played a major role in the overthrow of the Spanish; as a result of his activities he was declared a rebel against the crown. María apparently separated from her husband at this time. In April 1814 Ygnacio Calvillo was murdered at his ranch during a raid; initially the raid was thought to have been perpetrated by Indians, but subsequent investigation revealed that the attackers included Ygnacio's own grandson. At this time María gained control and ownership of the property. On August 28, 1828, she formally petitioned the Mexican government for a new title to her father's ranch; it was granted the next month. Later grants in 1833 placed three leagues of land under her control. Her will passed ownership of the property to two of her adopted children, María Concepción Gortari and Antonio Durán. María Calvillo died on January 15, 1856.