Esperanto letters with diacritics

Ĉ or ĉ (C circumflex) is a consonant in Esperanto orthography, representing the sound , the pronunciation of the English as in "cheese".

Ĝ or ĝ (G circumflex) is a consonant in Esperanto orthography, representing a voiced postalveolar affricate (either palato-alveolar or retroflex), and is equivalent to a voiced postalveolar affricate or a voiced retroflex affricate .

Ĵ or ĵ (J circumflex) is a letter in Esperanto orthography representing the sound .

thumb|Latin H with circumflex|class=skin-invert-image

Ŭ or ŭ is a letter in the Belarusian Latin alphabet used since 1840/1845, based on u. It is also used in the Esperanto alphabet, publicly presented in 1887, and formerly in the Romanian alphabet. The accent mark (diacritic) is known as a breve.

thumb|Latin S with circumflex|class=skin-invert-image