Boleslav is notorious for the murder of his brother Saint Wenceslas, through which he became duke of Bohemia. Being remorseful of what he had done, Boleslav vowed to devote his son to religion and educate him as a clergyman. He kept his word. wiki: 

Boleslaus' reign is most notable for the foundation of the diocese of Prague in 973. It was placed within the jurisdiction of the Archbishop of Mainz. wiki: 

He was the "worst of all men who ever sat on the Bohemian throne." He was a weak ruler in whose chaotic reign Bohemia became a pawn in the long war between the Holy Roman Emperor Henry II and Boleslaw the Brave, King of Poland. In a dispute with his nobles, he was trapped, blinded and imprisoned, probably dying in captivity some thirty years later. wiki: 

Bořivoj I was the first historically documented Duke of Bohemia (870–889) and founder of Přemyslid dynasty. WIKI wiki: 

He kidnapped his future wife from a nunnery (1019). Later, he was the author of decrees concerning the rules of Christianization, which included a ban on polygamy or trade on holidays. wiki: 

He was imprisoned at Lysa and assassinated by one of the Vršovci in 1035, a year after his brother. wiki: 

Oldrich died abruptly on 9 November 1034 and later examination of his skeleton reveal his skull to have suffered a fatal blow. wiki: 

Spytihněv is known for his alliance with Margrave Luitpold of Bavaria, who in 898 fought against Mojmír II, finally separating Bohemia from the Greater Moravian realm. WIKI wiki: 

Upon the death of his elder brother Spytihnev in 915, Vratislaus became Bohemian duke at a time when his duchy had already turned away from Great Moravia and had fallen under East Frankish, especially Bavarian influence.

Vratislaus is credited with the donation of St. George's Basilica at Prague Castle and also with the foundation of the Silesian city of Wrocław (Vratislavia). WIKI wiki: 

Wenceslas is the subject of the Christmas carol "Good King Wenceslas". He is venerated as Saint Wenceslaus and is the main patron saint of the Czech state. His murder in September of 935 was the result of a plot involving his younger brother Boleslav I of Bohemia. wiki: 

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