Khiva (Khorezm) – Flag in Lexicon and Shop https://www.flaggenlexikon.de/fchiwa_me.htm
The Khanate of Khiva is the former historical Empire of Khorezm, later a Turkestan state. Its flag or banner was a simple black, but later also a plain white bunting.
Russia 1740–1792 · conquest by the Persian Nadir Shah, reign of Kirghiz Khans 1792 · the Uzbek Mehemmed Emin