The Estudillo family was prominent in California history, and consisted of:
- José María Estudillo, the patriarch of the family
- José Joaquin Estudillo, eldest son of José María, and founder of San Leandro, California
- José Antonio Estudillo, youngest son of José María, and prominent citizen of San Diego, California. Additionally, his house, called the Estudillo House, is a U.S. National Historic Landmark
- José G. Estudillo, son of José Antonio, California State Treasurer
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