Ḉ

Ḉ (minuscule: ḉ) is a Latin script letter formed from C with added acute accent and cedilla.

Usage
It is used in the Estonian KNAB transliteration standard when representing Cyrillic letters of several Northwest Caucasian languages. In transliteration of Abaza, it represents the letter ЧӀ. In transliteration of Abkhaz, it represents the letter Ҷ. In transliteration of Adyghe, it represents the digraph КӀ.

Unicode
The unicode codepoints are U+1E08 for the upper-case letter, and U+1E09 for the lower-case one.