Blas Martin Serrano (abt. 1670 - ) Rosa de Vargas Machuca (1690 - ) Blas Martín Serrano and Rosa de Vargas Machuca were the parents of  Juan Martín.  We know this because of Juan’s baptismal record at the church in Santa Cruz, Rio Arriba County, New Mexico.  Blas and Rosa were married in 1705. Blas was the son of Domingo Martín Serrano and his wife Josefa de Herrera.  Blas appears to have grown up in Santa Cruz. Rosa was the daughter of Juan de Vargas Machucha.  Her mother was Ana Olguín. Submitted by Donald Rivara, June 23, 2009. Copyright © Genealogy Trails All Rights Reserved with Full Rights Reserved for Original Contributor