 José Joaquín Estudillo

José Joaquín Estudillo (May 7, 1800 – June 7, 1852) was a Californio politician and landowner, who served as second alcalde of Yerba Buena, California (the precursor to San Francisco), and whose land holdings, known as Rancho San Leandro, formed the basis of the city of San Leandro.He was born at the Presidio of Monterey, to José María Estudillo, a Spanish soldier; his brother José Antonio Estudillo also played an important role in the settling of California.