The Hotcąk or Winnebago alphabet was adapted from the Fox syllabary, which was invented in the 1870s.
Hotcąk (Winnebago, Hocak Wazijaci, Hochank, Hochunk), a Siouan language with about 1,000 speakers in the US states of Wisconsin, Illinois and Nebraska. The Hotcąk speakers call themselves Hotcągara. Speakers of this language in Nebraska call themselves Winnebago and are recognised as a separate tribe.
The first row of Latin letters are those used by the Hocąk Wazijaci Haci Language and Culture Program, those in the second row are used by Paul Radin.
This alphabet was adopted as the official writing system of the Ho-Chunk Nation in July 1994
Source: http://www.hocak.info
Source: http://www.christusrex.org/www1/pater/JPN-hocak.html
The Encyclopedia of Hotcąk Mythology - information about the Hotcąk people and language: http://hotcakencyclopedia.com
Websites of the Ho-chunk (Hotcąk) Nation
http://www.ho-chunk.com
http://www.ho-chunknation.com
Hocak Worak - Newsletter of the Ho-Chunk Nation (in English)
http://www.hocakworak.com
Hotchank hit'é - The Winnebago language
http://hotcakencyclopedia.com/ho.GatschetHotchankHit'e.html
Winnebago Tribe of Nebraska
http://www.winnebagotribe.com