Below is list of historically documented heads of the Czech statehood in its various iterations, including rulers of Great Moravia in the period since 830 AD.
c. 644 - 661 according to 14th century Wenceslaus Hajek chronicle (disputed)
Legendary founding father of the Czech statehood (in the area of Říp). In written record first mentioned in Chronica Boemorum (12th century) and in Wielkopolska Chronicle (early 14th century, Poland).
Husband of princess Libuše of non-royal origin, legendary ancestor of the Přemyslid dynasty. In written record first mentioned in Christian's Legend [cs] (10th century).
Led a revolt against the Franks who had annexed Moravia during the incarceration of his relative, Svatopluk I. First written record in Annales Fuldenses (9th century).
Under his rule Bohemia seceded from Great Moravia in 895. Great Moravia began to disintegrate after his death. For later connection between Bohemia and Moravia see Moravia#Union with Bohemia.
Dukes and Kings of Bohemia under Přemyslid dynasty (c. 870–1306)
In 1004, Jaromir occupied Prague with a German army and proclaimed himself Bohemian duke, restoring the family's domain, albeit reduced. As brothers of Boleslaus III, Jaromir and Ulrich had a fight for the throne that lasted until 1034, when Ulrich died and Jaromir retired (and then murdered). Nevertheless, more land was at stake, as Moravia was reintegrated into Bohemia in 1019, after being reconquered from Poland, and given to Ulrich's son.
Children of Bretislav I, divided their inheritance:
Spytihnev kept Bohemia; the others divided Moravia:
Conrad received Brno;
Vratislav got Olomouc;
Otto inherited Znojmo.
The division was made ineffective by Spytihnev (1055), who extended his rule to Moravia, uniting the whole Premyslid domain under his control. However, after his death (1061), the landless brothers recovered the inheritance and divided it differently, as Vratislav inherited Bohemia:
Conrad recovered Brno but also received Otto's share in Znojmo;
Heiresses of Bohemia, they were the true inheritors of the power claimed by their husbands during the succession crisis. Of the three, Rudolf had the weakest claim, and also the lowest popularity. The conflict was settled when, in 1310, Elizabeth and John invaded Prague, and defeated their opponents, Anna and Henry.
The succession of Albert's son was not recognized by the Czech nobility for most of this era; the land was administered by the Landfrieden (provincial and territorial).
King of Hungary, elected by the insurgent Catholic Czech aristocrats as anti-king in 1469, but never crowned. In 1479, he agreed to limit his rule to Moravia, Silesia, and Lusatia, while retaining his title.
Son of Ferdinand II. Also King of Hungary and Holy Roman Emperor. From this time on, Bohemia no longer had an elective monarchy, with the Habsburgs having imposed their exclusive rule at the Battle of the White Mountain.
Grandnephew of Francis Joseph I. Also Emperor of Austria and King of Hungary. Ruled briefly during World War I; in November 1918 renounced participation in state affairs but did not abdicate.
^According to legend. See page of the duke for details.
^The intermission of other feudal lords of different branches could be seen as regencies, as it would happen, for example, in the 15-century Duchy of Austria, where Duke Frederick V exerted regency for his minor cousin, Ladislaus the Posthumous. However, these intermissions could be also similar, for example, to Kievan Rus', where rulers apparently "jumped" from place to place. Albeit this, nothing is proved.
^The note referring to the regencies could apply here as well. The reason Conrad did not receive his duchy right after his father's death could be related to a possible minority that stopped him for assuming his power sooner.
^The regency referred in previous notes may be proven here: in 1126, when his father died, he was too young to assume power. The rulers appointed by Sobeslaus I in the period 1126-40 could be functioning as regents.