EDIT 24th letter in Russian and Belorusian alphabets, lower case letter corresponding to Ц (U+0426)

International (likewise, German and Russian) standard transliteration: /c/, e.g. Б. Н. Ельцин (first President of the Russian Federation 1991-1999) - Boris El\'cin
British BSI standard transliteration: /ts/, e.g. Boris Eltsin

 kerfi