Where does “Birgün” come from?

Birgün (Turkish) comes from Turkish bir, from Ottoman Turkish بر, from Old Anatolian Turkish بر, from Proto-Turkic bīr — one.

Ancestry of “Birgün”, step by step

Birgün traces back through two separate lines of ancestry.

via Turkish bir

StepLanguageWordMeaning
1Turkishbira, an; some; mono
2Ottoman Turkishبرa, an; one
3Old Anatolian Turkishبرa, an; one
4Proto-Turkicbīrone

via Turkish gün

StepLanguageWordMeaning
1Turkishgünsun; daytime; daylight
2Ottoman Turkishگونday; sun; hide, leather
3Proto-Turkicgünsun, day; day, sun
Every word from Proto-Turkic bīr →Every word from Old Anatolian Turkish بر →Every word from Ottoman Turkish بر →