"Marcela de la Peña" appears in the Wiki page. She was born in Monclova, Coahuila, Mexico, about 28 Oct 1723, and married Alonso Barrera (or Bareda) on 12 Jun 1740, in Monclova. I believe her name should be rendered as "Marcela Flores de Castro." Her father's name is given in the Wiki as Manuel Flores de la Peña which is better rendered by Spanish rules as "Manuel Flores del Bosque" (b. abt. 1703, Coahuila, Mexico) since we know his father was "Manuel Flores de Peña" (b. abt. 1660, Spain) and his mother as "Isabel del Bosque" (b. abt. 1650, Monterrey, Nuevo Leon, Mexico) as given in their marriage record. Now, Spanish custom sometimes allows flexibility on the surname to be chosen by the individual and not necessarily that given at birth. Thus, is there documentation that Marcela called herself "de la Peña" or is that a contemporary researcher's designation? As is obvious, tracking her and her descendants woud be adversely affected by the wrong decision in determing her surname.