Where Montalvo got the name and what it means, if anything, is a mystery. Californian is attested from 1785. The element Californium (1950) was named in reference to University of California, where it was discovered.
State in the Far West bordered by Oregon to the north; Nevada and Arizona to the east; Baja California, Mexico, to the south; and the Pacific Ocean to the west. Its capital is Sacramento, and its largest city is Los Angeles.