When a real life country sells a ship to another country, the latter will usually rename it. CoW players should be able to do the same thing. When you click accept on a trade where you get a named unit a rename window (similar to the one that pops up when you build a unit), you type in a new name, and click confirm.
This will be especially helpful for incidents where someone gives you a ship for free, you accept, only to realize it's named after Adolf (you know who).
This will be especially helpful for incidents where someone gives you a ship for free, you accept, only to realize it's named after Adolf (you know who).