What does Esmeray mean?
From Turkish 'esmer' meaning 'dark, brunette' and 'ay' meaning 'moon', giving 'dark moon'. (A 'sunbeam/beloved' reading circulates but does not fit the Turkish elements and appears to be a folk reinterpretation.)
What does Yildiz mean?
The Turkish word 'yildiz' ('star'). The same word was later applied (as 'Yildun') to a star in Ursa Minor, but as a given name it simply means 'star'.