Quieta is a rare Italian, Romanian, German, English, and Latin name which I could see very unusual Czech or Slovak parents choosing. It derives from the Latin word quietus (quiet). This was the name of a saint.
Quentin is a French and English name which is also, rarely, used in Czech and Slovak. The nicknames include Quentinek and Tino. It derives from the Latin name Quintinus, and ultimately Quintus (fifth). Quintus was much more popular than any other Latin birth order name.