According to WordReference,
mir means "myrrh" in Turkish.¹
Another source claims it to be a contracted form of
mısır, which means "corn".²
Wiktionary in Turkish says it means "chief, commander, emir, leader"³, plus, a Wikipedia article⁴ and a baby name website⁵ coincide in meaning.
Nordic Names also gathers information about the meaning and says it's a combination of "lady" and "moon"⁶, according to
German name researcher and author
Wilfried Seibicke.
¹
https://www.wordreference.com/tren/mir²
https://tureng.com/en/turkish-english/mir³
https://tr.m.wiktionary.org/wiki/mir⁴
https://en.m.wikipedia.org/wiki/Miray_(Turkish_name)⁵
https://charlies-names.com/en/miray/⁶
https://www.nordicnames.de/wiki/Miray
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