I posted this question many years ago. I now know the answer, so this is for any cousins out there:
Leandro Rael's wife, Teodora de Jesus Atencio, was the daughter of Jose Matias Atencio and Niconora Vigil. Matias Atencio was the son of Ramon Atencio and Maria de la Luz Archuleta. Ramon Atencio was the son of Juan Lorenzo Atencio and Barbara Manzanarez.
Leandro Rael's mother was Ana Maria Martinez, the daughter of Gregorio Martinez and Maria Francesca Valdes. They were from Abiquiu.
Leandro Rael's father was Manuel Rael, the son of Juan Ygnacio Rael and Maria Dolores Corbova. They were from Taos, then moved to Arroyo Hondo in the 1830s or 1840s.