Thank you for your response and you bring up a good point; emancipated slaves would often assume the surnames of their previous owners. There were indigenous laborers working for the owners of the Spanish Ranchos. It is conceivable that at some point, the child worked for one of the Rancho Families. In this case the Reyes family. There may be slight evidence for this scenario in the 1850 US census of Los Angeles. Of course, this is conjecture until I can support my suspicions.
I realize I did not give any information regarding the individuals or families in question.
Does anyone have information regarding the children born out of wedlock to Josefa Felicana Dominguez? Josefa F. Dominguez was b. 28 Feb 1810, she is the daughter of Mariano Dominguez and Maria Venancia (Benancia) Sotelo. In “Spanish-Mexican Families of Early California 1769-1850” Vol. II by Maria Northrup, Page 66 there is a reference that Josefa Felicana Dominguez had several children born out of wedlock. I have located in Josefa F. Dominguez in the USCs of 1850, 1860, and 1870, and not once is there a mention of her children. She had a daughter named Josefa, Baptized #124 on May 15, 1828 at the Plaza Church de Los Angeles, to father gentiles (non-Christian Indian) named Chapo(?). There may also be another daughter named Gertrudis born prior to 1828.
Any help would be appreciated.