ASCII Character ĥLatin small letter h with circumflex
Ĥ or ĥ is a letter of some extended Latin alphabets, most prominently a consonant in Esperanto orthography, where it represents a voiceless velar fricative [x] or voiceless uvular fricative [χ]. Its name in Esperanto is ĥo (pronounced /xo/), or ĥi in the Kalocsay abecedary. Ĥ is the eleventh letter in Esperanto orthography. Although it is written as hx and hh respectively in the x-system and h-system workarounds, it is normally written as H with a circumflex: ĥ.