That's a very good idea for a quiz. Spelling correction - Ethiopia's former English name was spelt Abyssinia (extra I from what you have). Czechia and Moldova haven't really changed name, just the standard Anglicisation has changed (though very similar units were known as Bohemia-Moravia and Bessarabia in the past).
Czechia has official changed its name from the Czech Republic, and I discovered that Moldavia is just the Spanish and Portuguese spellings for Moldova. Thanks for pointing it out though!