St. Stephen was born "Vajk" in the town of
Esztergom. His father was the ruling Magyar Prince
Géza; his mother was Sarolt, the daughter of the
Transylvanian gyula.
Vajk was baptized at age 10 by Saint
Adalbert of Prague as a precondition of accepting the
crown from
Rome. He was given the baptismal name Stephen (István) in honour of the original early Christian
Saint Stephen. As it turned out, this was a fitting choice, as the name
Stephen derives from the Greek στεφανος,
stephanos, meaning "crowned".
Between
995 and
997, Stephen (still known as "Vajk") was the
lord of Nitra (an appanage principality of
Géza). Prince , or duke according to different authors.
Stephen married
Giselle of Bavaria, the daughter of
Henry II the Wrangler and
Gisela of Burgundy circa 995, but sources give various years for this event. By this marriage he became the brother-in-law of the future
Henry II, Holy Roman Emperor. Stephen and Giselle had at least three children: sons
St. Imre (also
Henry or
Emeric) and Ottó, and a daughter Hedvig.
In 997, prince Géza died and a succession struggle ensued. Stephen claimed
divine right to rule the Magyars, while Stephen's uncle Koppány, a powerful pagan noble, claimed the traditional right of seniority. Eventually the two met in battle and Stephen was victorious, partly thanks to Stephen's German retinue and military assistance from the noble
Poznan and
Hunt families. Thus, Stephen became the Sovereign of the Magyars in Transdanubia in 997 and managed to successfully unite virtually all Magyar clans by 1006. According to Hungarian tradition
Pope Silvester II sent a
magnificent jeweled gold crown to Stephen along with an apostolic cross and a letter of blessing officially recognizing Stephen as the Christian king of Hungary. The date of this coronation is variously given as Christmas Day,
1000 or
1 January 1001.
Stephen intended to retire to a life of holy contemplation and hand the kingdom over to his son
Imre, but Imre was wounded in a hunting accident and died in 1031. In Stephen's words of mourning:
By God's secret decision death took him, so that wickedness would not change his soul and false imaginations would not deceive his mind – as the Book of Wisdom teaches about early death.
Stephen mourned for a very long time over the loss of his son, which took a great toll on his health. He eventually recovered, but never regained his original vitality. Having no children left, he could not find anyone among his remaining relatives who was able to rule the country competently and willing to maintain the
Christian faith of the nation. Unable to choose an heir, King Stephen died on the Feast of the
Assumption in 1038 at
Székesfehérvár, where he was then buried. His nobles and his subjects were said to have mourned for three straight years afterwards.
Following Stephen's death, his nephew
Peter Urseolo (his appointed heir) and brother-in-law
Samuel Aba contended for the crown. Nine years of instability followed until Stephen's cousin
Andrew I was crowned King of Hungary, re-establishing the Árpád dynasty in 1047. Hungarian historiography saw Peter and Samuel as members of the Árpád dynasty, and both are counted among the Árpád kings.