Ĥ

Ĥ, or ĥ is a consonant in Esperanto orthography, representing a voiceless velar fricative or voiceless uvular fricative . Its name in Esperanto is ĥo (pronounced /xo/).

In the case of the minuscule, some fonts place the circumflex centred above the entire base letter h, others over the riser of the letter, and others over the shoulder.

ĥ in the fonts Code2000, Sylfaen, Pragmatika Esperanto

Since printers often lacked type for ĥ, L. L. Zamenhof allowed the use of hh as a surrogate. Hx is also used unofficially (there is no confusion, as the letter x is not used in Esperanto).