The names of the princes were first recorded in Cosmas chronicle and then transmitted into the most of historical books of the 19th century including František Palacký's The History of the Czech Nation in Bohemia and Moravia.
[2] Neklan's name is thought to be derived from the Slavonic word "klát" meaning to tilt and prefix ne- (non) so it describes him to be a peaceful ruler.
[5] 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.
[6] Once Vlastislav, the prince of Lučans (with their centre in Žatec on the river Ohře), started war against Neklan and besieged his castle, Levý Hradec.
However, his guide and second most powerful man in the Bohemian camps, a warrior called Tyr, persuaded him to lend him his armour.