They are Czechs, or Czech citizens.
"Syčák" is a Czech surname, so it is likely of Czech nationality.
Czech
Czech
Czech
Czech
Germany.
It's Czech.
Pavelka is Czech Linda Pavelka.
Pavelka is common Czech last name.
A Czech!He or she is called a Czech.
Bohemian (/əʊˈhiːmɪə/) refers to a resident of the former Kingdom of Bohemia, either in a narrow sense as the region of Bohemia proper or in a wider meaning as the whole country, now known as the Czech Republic. In English, the word "Bohemian" was used to denote the Czech people as well as the Czech language before the word "Czech" became prevalent.[