Two years ago Rebellion (Sniper Elite 3, Aliens vs. Predator) challenged Ironclad Games in court over the latter's use of Rebellion as a suffix in their sci-fi strategy title, Sins of a Solar Empire: Rebellion.
Rebellion, based in the UK, lost the first challenge, and according to a post by Ironclad on their forum, the studio would have liked the story to have ended there. It didn't, as explained below:
"Last week we received notice that Rebellion Developments and the Kingsley brothers have submitted evidence in opposition to our trademark application in Canada and we have unconfirmed reports that they issued a cease and desist order to our partner in the United Kingdom. We fully expect they will continue this worldwide but so long as the countries they choose to oppose us in protect freedom of expression, we intend to continue fighting."
The first challenge happened around the same time as Bethesda and Mojang settled a dispute over the title "Scrolls", so this isn't the first time that an issue like this has raised its head in the media. More recently there's been the scandal surrounding King and Candy Crush Saga, which you can read more about here.