Title says it all pretty much.
Asking for any disinherited heirs/successors who for one reason or another were declared unworthy or unwanted to rule, be it a country or a county.
Friend is running a D&D game where historical names have some significance so I'd like some additional ideas.
Also, if there's a proper term for the act in place of disinherit, please correct me.
Sorry, we don't allow "example seeking" questions. It's not that your question was bad; it's that these kinds of questions tend to produce threads that are collections of disjointed, partial, inadequate responses. If you have a question about a specific historical event, period, or person, feel free to rewrite your question and submit it again. If you don't want to rewrite it, you might try submitting it to /r/history, /r/askhistory, or /r/tellmeafact.
For further explanation of the rule, feel free to consult this META thread.