Three grants, comprising over 133000 acres of the former Mission San Luis Rey lands in the San Jacinto area were made to the Estudillo family: Rancho San Jacinto Viejo to José Antonio Estudillo in 1842; Rancho San Jacinto Sobrante to his daughter, María del Rosario Estudillo, in 1846; and Rancho San Jacinto Nuevo y Potrero to his son-in-law, Miguel Pedrorena, in 1846.