"Sequoia" is good, though hard to spell. "Mohave," "El Dorado," "San Gabriel," and "Temecula." Sure, a tree, or mountain, or desert, or butterfly or whatever.
Someone suggested "Reagan" for Southern California, but that's not going to happen. "Coronado" was also suggested for the Far South, but you know that's too much like "Colorado."
I think “Sequoyah” was a proposal for what became Oklahoma.
Coronado didn’t actually get into California...Cabrillo did. (Cabrillo was long thought to be Portuguese, but I read a recent book that argued that he was Spanish—the other belief was based on one document which was probably misinterpreted).
Serra is probably too Catholic a name. Indian activists would claim that the Franciscans enslaved their ancestors.
Reagan wasn’t a California native. Nixon was. I guess he is kind of controversial too. At least there has been no effort to make January 9th a national holiday (his birthday).
Maybe “Dystopia” would be a good choice.