O-hook
O-hook (Ҩ ҩ; italics: Ҩ ҩ) is a letter of the Cyrillic script. It is derived from the initial form of the Arabic letter hāʾ, . In the Unicode text-encoding standard, this letter is called "Abkhazian Ha". Its form bears some similarities to the Greek letter Theta (Θ θ/). In English, O-hook is commonly romanized using the Latin letter O with dot below (Ọ ọ) but its ISO 9 transliteration is the Latin letter O with grave accent (Ò ò). O-hook is used in the alphabet of the Abkhaz language where it represents the labial-palatal approximant , the sound of  in French "" (). It is placed between Ы and Џ in the alphabet. Computing codes

 In Unicode version 1.0, the letters were called CYRILLIC CAPITAL/SMALL LETTER O HOOK. References

Further reading
 Daniels, Peter D. The World's Writing Systems. Oxford University Press, 1996.