De Haro Street, in the Potrero Hill neighborhood of San Francisco, is named after him.
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After Mexico gained independence from Spain in 1821, the Mexican government granted Potrero Nuevo to Francisco and Ramon de Haro - the 17-year-old twin sons of Don Francisco de Haro, then alcalde (mayor) of Yerba Buena (modern day San Francisco) in 1844.
When his father traveled up to see how his three sons were being treated in jail, the father and two cousins, twin sons of Francisco de Haro, were shot and killed in San Rafael by a group of three men, including Kit Carson, assigned the task by Frémont.