Californian's rhymes with:
californians, californians, californians, californians, californians, californians, californians, californians, canyon's, canyons, companions, dominion's, kenyans, minions, onions, opinions, reunions, runions, union's, unions, unions', virginians
Californian's sounds like:
california's, californians, claiborne's, cleverness, clobbering, coliforms