Oro Fino (fine gold), in Siskiyou County. See page [261].
Oro Grande (large or coarse gold), forty-nine miles north of San Bernardino. Also in Madera County.
Oroville (gold-town). See page [288].
Oso Flaco (thin bear). In San Luís Obispo County.
Los Osos (the bears). See page [128].
Otay, or Otai, was the name of a former Indian village near San Diego. It may have first been applied to the Otey or Otay land grant.
Otero (literally a “hill, or eminence,” but probably a surname here).
Pachappa, near Riverside, Indian name, meaning not ascertained.
Pacheco (a surname). See page [230].