Looking at the baptisms for Josefa, LA Bats #124, 13 May 1828 and Gertrudis LA Bats # 109, 8 Feb 1828; both children are noted to be of the Gentile known as Chapo, with no mother listed, but, Josefa Dominguez, daughter of Mariano Dominguez [and Benancia Sotelo]is listed as the madrina for both children.
11 Apr 1830 Ma. Josefa Dominguez, single, daughter of Mariano and Benancia [Venancia]Sotelo had a child with Ireño Perez her name was MARIA CASILDA PEREZ. There may be more, I just happened on this one while reading the baptisms of the 2 children above.
This may or may no be the same parents as above:
2 Mar 1843-San Gabriel confirmation #2886) JUAN PEREZ, of Ireneo and Josefa Dominguez