From David Montejano, Anglos and Mexicans in the Making of Texas, 1836-1986, pp. 36-37.
As in San Antonio and Laredo, the acommodation between the old and incoming elites in the Lower Valley manifested itself in tactical marriages. It was customary among the Mexican elite, as Jovita González has noted, that daughters weremarried at an early age, and not for love, but for family connections and considerations.  On the other hand, for the Anglo settler, marrying a Mexican with property interests made it possible to amass a good-sized stock ranch without considerable expense. The Americans and the European immigrants, most of whom were single men, married the daughters of the leading Spanish-Mexican families and made Rio Grande Citya cosmopolitan little town.Among those who claimed the Spanish language was their own were families with such surnames as Lacaze, Laborde, Lafargue, Decker, Marx, Block, Monroe, Nix, Stuart, and Ellert. As one Texas Mexican from this upper class recalled:There were neither racial nor social distinctions between Americans and Mexicans, we were just one family. That was due to the fact that so many of us of that generation had a Mexican mother and an American or European father.
[…] For the Anglo settlers, some degree ofMexicanizationwas necessary for the most basic communication in this region, given the overwhelming number of Mexicans. But such acculturation meant far more than the learning of a language and proper etiquette; it represented a way of acquiring influence and even a tenuous legitimacy in the annexed Mexican settlements. From participation in religious ritualis and other communal activities tobecoming familythrough godparenthood or marriage–such a range of ties servedto create an effective everyday authority, a type that Ranger or army guns alone could not secure.