I believe this feature is already in the works as I’ve seen discussions of it in the past. Here’s a previous thread.
[url]https://forum.vassalengine.org/t/new-patch-in-my-branch-for-inclusion-in-trunk-and-3-1-branch/2746/1]
In the meantime, you may consider what I generally do in that I open the prototype I want, copy the name and then paste it where I need it. It’s a bit of a hassle but doing as much copying and pasting as possible will certainly reduce any typos that my occur.