In the 19th century, Czech philosopher Ignác Jan Hanuš was a popular fantasist, particularly known for his Die Wissenschaft des slavischen Mythus and Bájeslovný kalendář slovanský.
[7] Many of the deities were created by Andreas Gottlieb Masch (1771),[20] a German theologian who studied the so-called Prillwitz idols, taking them to be authentic Slavic statues, but which are now recognized as 17th century forgeries.
Hájek gained imitators after his death: Pavel Stránský, Jan Jiří Středovský, Juraj Papánek, who added the following deities by themselves: Chasoň, Ladoň, Zeloň, Živěna, Nočena, Krasopaní, Hladolet.
It lists, in addition to authentic gods, the following pseudo-gods:[26] One of the major forgeries from the South Slavs is the Serbian Песме и обичаи укупног народа српског (1869; "Songs and customs of the all Serbian peoples") by Miloš Milojević:[30] The second important forgery is Veda Slovena (1874) by Stefan Verković:[31] In Croatia, a long list of authors contributed to romanticized interpretations, uncritical theories and unverifiable claims about Croatian pagan beliefs.
This group includes the likes of Giorgio Sisgoreo, Marin Držić, Matija Petar Katančić, Pavao Ritter Vitezović, Natko Nodilo, Nikola Sučić and Franjo Ledić, among others.