Cashio’s origins are unknown. The name might have been inspired by an ancient English estate called Cashio – later Cassiobury – in Hertfordshire. That seems farfetched, but L.A. civil engineers often turned to “idea files” for potential street names, which surely included obscure British place names lifted from books and maps. (Cashio Street was named not by city ordinance but by private developers; however, it was not uncommon for developers to outsource the street naming work to the City.) For what it’s worth, Hertfordshire’s Cassiobury House was still intact and relatively well-known when Cashio Street was named in 1923. To add to the puzzle, there was an entirely different Cashio Street in South L.A. from 1903 until 1908, when it was renamed E. 50th Place.
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