Here's a left-field suggestion, utterly devoid of evidence: Northern Iraq?
The other thread stated that nimchas were known in Iraq; Kurmanji-speaking Northern Iraq is within the Persian cultural realm; the peacock is sacred to the local Yezidis; and they perform ritual ox sacrifice, in (perhaps) a similar manner to the Gurkhas, who use a kopis-like giant kukri for the purpose...
I can't
prove any of this though
