Where does “Ocna Mureș” come from?

Ocna Mureș (Romanian) comes from Romanian ocnă, from Old Church Slavonic окно, from Proto-Slavic okъnò — window.

Ancestry of “Ocna Mureș”, step by step

Ocna Mureș traces back through two separate lines of ancestry.

via Romanian ocnă

StepLanguageWordMeaning
1Romanianocnămine, especially salt mine
2Old Church Slavonicокно—
3Proto-Slavicokъnòwindow

via Romanian Mureș

StepLanguageWordMeaning
1RomanianMureșMureș (river)
2HungarianMaros—
Every word from Proto-Slavic okъnò →Every word from Old Church Slavonic окно →Every word from Romanian ocnă →