The names of the princes were first recorded in Cosmas chronicle and then transmitted into most historical works up into the 19th century, including František Palacký's The History of the Czech Nation in Bohemia and Moravia (1836).
One theory connects the number of princes to the frescoes on the "Ducal Rotunda" of the Virgin Mary and St Catherine in Znojmo, Moravia, which date back to the late 11th or early 12th century.
[1] Nezamysl's name is thought to be derived from the opposite meaning to Přemysl - "not thinking", cf.
According to postulation by Vladimír Karbusický,[3] Cosmas likely contrived them when trying to read a lost Latin transcription of an old-Slavonic message.
[4] When the ancestral names are combined and reassessed, they can roughly cohere an assumed text: "Krok‘ kazi tetha lubossa premisl nezamisl mna ta voj‘n ni zla kr‘z mis neklan gosti vit..." In modern English, this may translate to: "Halt your steps, Tetha, and rather think, I do not intend war or evil upon you, we do not bow to the cross, we welcome guests..." The alleged message is speculated to be from the Czech princes to the Franks, perhaps in relation to the Battle of Zásek c. 849 described in the Annales Fuldenses.