Renaming it in lore like Gallia already did with Leeds is one thing.
Actually renaming it ingame to reflect a decision one house made is another.
Lyth is right. Why would Liberty accept Edinburgh or Orkney being renamed? Should I accept California being renamed since it too has a fancy Gallic name? No. Should Bretonia?
No.
Also, rename Anaheim to something different (or back to Cali Minor). Sacramento, Fresno, San Jose, cities that are bigger and more notable than just being 'that place where Disneyland is'.