Many of the early families of Aguacalientes also had relations in San Luis Potosi. I am trying to solve a puzzle of shared compound surnames among the Nietos of Zacatecas, Aguascalientes, and San Luis Potosi.

Don Esteban Nieto (II) (estimated birth 1642) of San Luis Potosi was married twice, first to a Juana Gonzalez, second to a Dona Ana Diaz Rodriguez y Salas 26 November 1670 in San Luis Potosi. Ana was the daughter of a Rodrigo Martin and an Ana Rodriguez. Don Esteban Nieto II’s parents are not named in the marriage.

Don Esteban Nieto (II)’s descendants mostly spread throughout Armadillo de los Infante, San Luis Potosi. Strange surnames appear among two of his sons by his second wife: Augustin and Pedro. Augustin Nieto married three times, first to Angela del Castillo, second to Felipa de Cervantes, and third to Maria de Villalobos. Augustin Nieto’s descendants spread throughout Aguascalientes and, correct me if I am wrong; some begin appearing with the surname “Nieto Corona.” Don Esteban Nieto (II)’s son Pedro went by the name “Pedro Hernandez Sedillo”.

This would seem to indicate Don Esteban Nieto (II) as a son of Pedro Nieto (son of Hernando de Almeida and Isabel Hernandez) and Dona Josefa Corona. Esteban’s estimated birth of 1642 seems to match up with Pedro Nieto’s other children in Pinos. This would seem to explain why at least the surnames Hernandez and Corona spontaneously appear among the descendants of Don Esteban Nieto (II) (the origins of Sedillo/Cedillo is still a mystery). However, Pedro Nieto is not Esteban’s father.

Don Esteban Nieto (II)’s parents are not named in his marriage but curiously they are named when he was a padrino to the baptism of a boy “Leon?” (baptized 3 September 1690, in Armadillo de los Infantes) found here:

https://familysearch.org/ark:/61903/3:1:9392-SY44-L?i=427&wc=3PH4-VZ9%3…

Don Esteban Nieto (II) is named as the son of Esteban Nieto (I) and Ysabel Perez. This is the only primary source I have seen that directly names Don Esteban Nieto (II)’s parents.

This information seems to correspond to an old web-post found here:
http://www.genealogy.com/forum/surnames/topics/diaz/442/

Here Don Esteban Nieto (II) is named as “Esteban del Nieto y del Rio” and described as a son of an “Esteban del Nieto y Rodruguez” with the assumption that Don Esteban Nieto (II) was related to his wife Dona Ana Diaz Rodriguez y Salas. If they are related it might be through Ana’s mother Ana Rodriguez. I have been unable to contact the original poster of this information, so I do not know of its accuracy.

The question remains: Why do some of Augustin Nieto’s descendants use Corona? …Could Dona Josefa Corona’s husband Pedro Nieto be a brother or father to Esteban Nieto (I)?