José Antonio Menchaca was a fourth-generation Tejano, the son of Juan Mariano Menchaca and María de la Luz Guerra. According to the parish baptismal register, Father Gavino Valdez baptized the eight-day-old José Antonio on 17 January 1800. Although in the years before his death in 1879 he would claim descent from the wrong first settlers of San Antonio, he was nevertheless correct that his ancestors were among the town’s founders.
 It is a shame that Antonio apparently was unaware of his family’s colorful roots in his beloved San Antonio. Both of his maternal great-grandfathers were soldiers in the city’s earliest days. Antonio Guerra was one of the men Governor Martín de Alarcón recruited in Monclova for his 1718 expedition to found a settlement on the San Antonio River, and between 1718 and sometime in the 1740s Guerra served in the presidio company there. Whether he was married before or after he came to San Antonio is not clear, but he and his wife, Catarine Jiménez Menchaca, had at least four children during his enlistment. Having made his life in San Antonio, Guerra lived out his retirement among his children and grandchildren, passing away in the spring of 1759.
Among Antonio and Catarina’s children was Antonio’s grandfather, José Joaquín Guerra, who was baptized in San Antonio on 19 February 1735 and buried there on 19 April 1790. Little is known of Joaquín, who for at least part of his adult life made a living as one of the civilian assistants at Mission San Antonio de Valero. On the few occasions that he appears in the town’s and mission’s sacramental records, he is listed as a “mestizo,” a “mulato,” or, as in his burial record, a “coyote.” Likewise, his wife, María Guadalupe de Ávila, who had at least twelve children with him between 1763 and 1781, is recorded as a “mestiza” or a “mulata” in the sacramental records. That the children of soldiers who appear in the records as españoles (Spaniards) were later identified as being of mixed blood is not surprising, for in the eastern frontier provinces of New Spain, there was a tendency to equate military service with pure Spanish blood. The  magic that an officer could perform with a pen on behalf of his soldiers, improving their calidad (quality) to that of Spaniards, generally did not extend to their children after they moved out on their own or even to themselves following their retirement.
Antonio’s grandmother, María Guadalupe de Ávila, was the daughter of Antonio’s other great-grandfather, Felipe de Ávila, who came from Saltillo, Mexico, and entered military service in San Antonio in 1722. An enlisted man, Ávila has the distinction of having been involved in a 1730 homicide that led to the oldest recorded criminal investigation in San Antonio’s history. According to the testimony, Ávila found his wife, Ildefonsa (or Aldonza) Rincón, naked in bed with Nicolás Pasqual, and there was an altercation during which Pasqual stabbed Ávila, who was saved by his brother-in-law and next-door neighbor, Sabatián Rincón. A few weeks later there was a second confrontation during which Ávila shot Pasqual dead. Found not guilty of murder, he was nevertheless ordered transferred to Presidio del Río Grande, and he then disappears from the record. His family remained in San Antonio, where his sons went on to serve in the presidio and acquire property and his daughter María Guadalupe married Joaquín Guerra.
 Among the dozen children born to María Guadalupe Ávila and Joaquín Guerra between 1763 and 1785 was María de la Luz Guerra, Antonio’s mother. Luz’s marriage to Mariano Menchaca produced ten children, of whom Antonio was the sixth. Like the other children of early soldiers, Luz appears in the documents as being of mixed blood. Baptismal and census records list her variously as a “mestiza,” “mulata,” “loba,” or “coyote,” and all but the last two of her children are similarly identified in the baptismal registers as “mestizos,” “coyotes,” “lobos,” or “tresalvas.” Sometime between 1820 and 1830 she became widowed, and, as Antonio relates, she lived into the 1840s.
At the time of his death sometime in the 1820s, when he was in his mid-to late sixties, Antonio’s father, Mariano Menchaca, had achieved a measure of prosperity. Having opted not to follow his father into military service as other Bexareños (residents of the San Antonio de Béxar area) did in the last decades of Spanish rule, Mariano rounded up horses and cattle as opportunities arose and otherwise hired out for agricultural work. The last Spanish colonial census of San Antonio, taken in 1820, lists Mariano as a resident of the barrio del sur, that is, the town’s south ward, which extended south from what are today Dolorosa and Market Streets between San Pedro Creek and the San Antonio River. It also indicates that he was a labrador, or landholding farmer. Taking Antonio at his word that the family was in San Antonio in 1813 when Joaquín Arredondo entered the city following the battle of Medina, Mariano appears to have been one of the many residents of the city who avoided becoming entangled in the bloody rebellion against Spanish rule. Mariano was also one of those individuals who experienced gradual “whitening” over time, early records recording his status as a “coyote” or “mestizo,” but later records referring to him as an “español.”
Matovina and de la Teja, “Introduction: Antonio Menchaca in Texas History,” in Antonio Menchaca, Recollections of a Tejano Life: Antonio Menchaca in Texas History, edited by Timothy Matovina and Jesús F. de la Teja, with the collaboration of Justin Poché (Austin: University of Texas Press, 2013)., 4-7.