Rancho San Juan Cajón de Santa Ana
Juan Pacifico Ontiveros (1795-1877) was a corporal at the Mission San Gabriel Arcángel and later mayordomo (foreman) of Mission San Juan Capistrano. In 1825, Ontiveros married María Martina Osuna (1809-1898), step daughter of Tomás Olivera, grantee of Rancho Tepusquet.
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored. As required by the Land Act of 1851, a claim for Rancho San Juan Cajón de Santa Ana was filed with the Public Land Commission in 1852, and the grant was patented to Juan Patricio Ontiveras in 1877.
In 1853, Ontiveros sold 21,527 acres (87.1 km2) to Abel Stearns. In 1855, Ontiveros bought Rancho Tepusquet, in present-day northern Santa Barbara County, from his father-in-law Tomás Olivera. In 1856, he moved to Rancho Tepusquet, constructed an adobe house and lived there until his death.
Juan Nicolas Ontiveros and Patricio Ontiveros had remained on Rancho San Juan Cajón de Santa Ana. In 1863, Juan Pacifico gave them 3,900 acres (16 km2) of Ranch San Juan Cajón de Santa Ana. At this time, they were both married. Juan Nicolas and Patricio did not keep their share very long, and in 1864, both deeded their share to their brother-in-law, Augustus Langenberger (married Pietra Ontiveros). In 1865, Daniel Kraemer started the influx of settlers to Placentia, when he purchased 3,900 acres (16 km2).
- Ogden Hoffman, 1862, Reports of Land Cases Determined in the United States District Court for the Northern District of California, Numa Hubert, San Francisco
- Diseño del Rancho San Juan Cajón de Santa Ana
- Spanish and Mexican Ranchos of Orange County
- U.S. Geological Survey Geographic Names Information System: Rancho San Juan Cajón de Santa Ana
- Juan Pacifico Ontiveros and his wife, Maria Martina Osuña
- United States. District Court (California : Southern District) Land Case 140 SD
- Report of the Surveyor General 1844 - 1886
- Annie L. Morrison and John H. Haydon, 1917,History of San Luis Obispo County and Environs California with Biographical Sketches, Historic Record Company, Los Angeles, California