Where does “Gökay” come from?

Gökay (Turkish) comes from Turkish gök, from Ottoman Turkish گوك, from Old Anatolian Turkish كوك, from Proto-Turkic kök — root.

Ancestry of “Gökay”, step by step

Gökay traces back through two separate lines of ancestry.

via Turkish gök

StepLanguageWordMeaning
1Turkishgöksky; blue
2Ottoman Turkishگوكsky; light blue, azure
3Old Anatolian Turkishكوكblue
4Proto-Turkickökroot

via Turkish Ay

StepLanguageWordMeaning
1TurkishAymoon; Moon
2Ottoman Turkishآیmoon; month
3Old Anatolian Turkishآیْ—
Every word from Proto-Turkic kök →Every word from Old Anatolian Turkish كوك →Every word from Ottoman Turkish گوك →