Where does “Serhat” come from?

Serhat (Turkish) comes from Ottoman Turkish سرحد, from Persian سرحد, from Persian سر, from Middle Persian 𐭫𐭥𐭩𐭱𐭤, from Proto-Iranian *cŕ̥Hah, from Proto-Indo-Iranian ćŕ̥Has, from Proto-Indo-European ḱŕ̥h₂-os, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “Serhat”, step by step

StepLanguageWordMeaning
1Ottoman Turkishسرحدborder
2Persianسرحدborder, frontier
3Persianسرhead; the topmost, foremost, or leading part;...
4Middle Persian𐭫𐭥𐭩𐭱𐭤head; top, summit
5Proto-Iranian*cŕ̥Hah—
6Proto-Indo-Iranianćŕ̥Hashead, top
7Proto-Indo-Europeanḱŕ̥h₂-os—
8Proto-Indo-Europeanḱerh₂-head, top; horn
Every word from Proto-Indo-European ḱerh₂- →Every word from Proto-Indo-European ḱŕ̥h₂-os →Every word from Proto-Indo-Iranian ćŕ̥Has →