Tomas de Villalpando and Michaela Romo de Vivar

Tomas de Villalpando and Michaela Romo de Vivar had several children, most likely born in Rincon de Romos, which included Juan Villalpando. I have not found their marriage record.

Juan Villalpando married Refugio Gonzales, and had Bacilio, among others in the early 1800s. Tomas and Michaela are named in the baptismal records.

Bacilio Villalpando married Tomasa Martinez and Maria Librada Mendosa, and had children by both wives in the 1840-60 period. Juan and Refugio are named as grandparents in the baptismal records.

My question: who were the parents of Tomas de Villalpando and Michaela Romo de Vivar?

George Fulton
Pleasanton, CA