All known by other names?
Dublin = Baile Átha Cliath
Oslo = Christiania
Istanbul = Constantinople
Saigon = Ho Chi Minh City
Lille = Rijsel
Madras = Chennai
Dublin = Baile Átha Cliath
I can't suggest anything else but I'm a bit dubious about Dublin. Baile Atha Cliath is it's name in Irish but that is a bit like saying Rome and Naples have other names because they are called Roma and Napoli in Italian.