My trip to the library confirmed the parentage of Maria Victoria Tenorio, mother of Maria Apolonia Martin, wife of Francisco Xavier Sanchez.
Thenorio, Maria Victoria bapt. 15 April 1759, daughter of Manuel Thenorio and Polonia Sandoval; gp/el Alferez Don Bartholome Fernandez and Dona Luisa Thenorio.
Frame 99 AASF#15 1747-1799
[Source: New Mexico Baptisms of Santa Fe Parish of Francis of Assisi vol. I 5 Sept. 1747-17 July 1791 by Margaret Windham]
Victoria's parents married two years before her birth:
26 July 1757 - Manuel Thenorio de Alba y Corona married Dona Polonia Sandoval, both single. Witnesses: Phelippe Tafoya and the Sargent Reformo Cristoval Martin
[Source: New Mexico Marriages Santa Fe - St. Francis Parish and Military Chapel of Out Lady of Light 1728 - 1857 compiled by Margaret Leonard Windham]
Regrettably, neither of these records reveals the parents of Manuel Thenorio or Apolonia Sandoval.
By 1760, Apolonia Sandoval was widowed and was remarrying. That record revealed her parentage:
1760, Nov. 29 (no. 5), Santa Fe or Santa Cruz. Jose Salvador Garcia (33) of Santa Cruz, widowed of Da. Maria Martin, son of Capt. Don Juan Esteban Garcia de Noriega and Da. Luisa Gomez del Castillo, and Da. Apolonia Sandoval of Santa Fe, widow of Manuel Tenorio, daughter of Don Antonio Sandoval and Da. Josefa Duran y Chaves. Witnesses: Felipe Tafoya, Santa Fe notary. Manuel de Arteage, Santa Cruz notary; Antonio Dominguez (48), Jose Fresquis (49).
[Source: New Mexico LTC, vol. p. 595]