Tried San Bernardino but maybe I spelled it wrong. Also, I usually think of San Bernardino as part of the greater Los Angeles metropolitan area. I would have guessed San Diego or Fresno first as they are more distinct; or San Jose which is not any more distinct from San Francisco but is a larger population center I think. I even tried Sacramento though I know Sac isn't very big, comparatively speaking.
San Jose has a large, seperated metro as well, but smaller population wise. Sacramento's Metro has over 2.17 M, not too far of from Seattle's. San Diego's has 3.14M, just 2 numbers in ranking from Seattle. Fresno's has 942K. Great Thinking Though!