Headword:
San Mateo.
Principal English Translation:
both a personal name (male) and a place name (referring to the patron saint, Matthew, taken by a given community); eventually, when used as a personal name, the San before the Mateo would be dropped, resulting in what would appear to be two given names, such as Juan Mateo; the use of the full "de San Mateo," something like a surname, was more characteristic of the 16th c.
Orthographic Variants:
Sanc Mateo