Behind the name
Mir(ë) comes from proto-baltic-slavic languages that use the root “mir” in words designating “peace”, “world” or “good”.
Мир in Ukrainian, Serbian, Macedonian, Russian;
Mip in Belarus;
Mír in Czech and Slovak;
Mir in Polish, Slovenian and Bosnian
Miers in Latvian, Lithuanian;
all mean "peace".
Mirë in Albaninan and in Kosovare means "good".