A Shortened Place Name
El Pueblo de Nuestra Señora la Reina de los Ángeles de Porciúncula (which translates to the English as the Town of Our Lady the Queen of the Angels of Porciúncula) was the name of the Spanish civilian pueblo founded September 4, 1781, now known as Los Angeles. It was also called El Pueblo de Nuestra Señora la Reina de los Ángeles del Río Porciúncula (in English, the Town of Our Lady the Queen of Angels of the River Porciúncula).
For a few more versions of the name, see http://articles.latimes.com/2005/mar/26/local/me-name26