Name 10...and the date...
That’s easy:
The United States; Canada; Germany; Poland; Portugal; most African countries; Pakistan; Bangladesh; Slovak Republic; Slovenia; Bosnia-Herzogovina; Moldava; Sri Lanka; Oman; Guyana; Belize; Surinam...you get the picture. And those are just some of the current ones.
The first to come to mind:
Konigsberg changed to Kaliningrad; Brzesc to Brest Litovsk; Luck to Lutsk; Lwow to Lvov; Nowogrodek to Novogrudok; Baranowicz to Baranovichy.
When? When Russia (USSR) took them during WWII and shortly after.