It should be possible to rename towns, villages and castles.
To prevent you from going NUTS from the start, and giving everything a new name, it should function as follows:
- To grant a fief a new name, you need to have owned said fief for 200+ days, equal to a year of ingame time if i remember correctly.
- The name change must go through a kingdom vote, where you spend influence. The more lords who disagree with the namechange, the more influence it costs.
- After the name chnage, the fief will get a penalty to loyalty and security, lasting 400 days.
- At day 401 after the name change, the fief will recieve a small bonus to loyalty and security, lasting untill the fief changes name again.
- If the settlement is retaken by the original faction owner, the name will be changed back to it's original state without penalty, losing any bonuses/penalties.
This could be extended to kingdoms/clans or characters, with similar effects.
Lastly, there should be a toggle in the character creation screen, that allows you to ignore these features partially or completely.