There are a lot of places in Cal­i­for­nia named after saints. And since the Span­ish mis­sion­ar­ies were here well before any English-speaking Amer­i­cans (or the Rus­sians, who came down from Alaska and left their mark on place-names like Russ­ian River), these towns start with San or Santa, depend­ing on the saint’s gen­der. As in San Jose, Santa Bar­bara, San Rafael, Santa Clara, and, of course San Fran­cisco. This one I found on a shop sign near Wash­ing­ton Square.

Never heard of that Saint.