The study is dedicated to the beginnings and development of the Bohemo-Moravian nobility, the role of the elites and specific terminology used in preserved sources like chronicles and other documents. The greatest attention is paid to legal sources, especially a set of provisions in early provincial law called the Statutes of Conrad Otto from the first half of the 13th century. This work contains important information on the possible stratification of the Bohemo-Moravian nobility as well as their role in the offices and the provincial judiciary. The 13th century brought a great transformation of the nobility class, especially the formation of noble dominions following colonisation, which was also reflected in the terminology.