|son of:||Béla I|
|period of reign:||1074-1077|
|children:||Coloman, Álmos, Katharina|
Géza I, King Béla I’s and Richeza Polish Princess’s son was born during their Polish residence. Géza I returned to Hungary together with his father in 1048. In 1057 Géza and his brother Ladislaus acknowledged their cousin Salamon as king. Nevertheless, he fled to Poland in 1059 with his father. Later he also took part in civil wars, after which his father Béla I was crowned in 1061. After his father’s death Géza and his brothers Ladislaus and Lambert repeatedly acknowledged Salamon as king He even put the crown on Salamon’s head himself in Pécs. Later Géza I took part in the wars against the Pechenegs and Byzantines heroically. Géza's and Solomon's relationship only began to worsen during the siege of the Byzantine fortress of Nándorfehérvár (Belgrade) in 1071 , where the enemy troops preferred to surrender to Géza instead of the king.
When the Byzantines took back Nándorfehérvár in a tricky way in 1072, Géza accompanied the king to the military campaign against Niš. Nevertheless, later he was also preparing for the civil war. In 1073 the relatives made peace with each other again for a while. At the same time, Salamon’s troops unexpectedly wanted to attack Géza, who was hunting in the woods. The prince stroke back leading his own army in the Tiszántúl region. Although he had lost the battle in February 1074, his remaining troops managed to escape and join the army of Ladislaus, defeating the king in a final combat around the city of Mogyoród in March.
Géza accepted the throne due to the persuasion of his followers, but was not crowned, despite the fact, that the Byzantine Emperor Michael VII sent him a royal crown in 1075. After Salamon’s failure of retrieving the throne with his allies, Géza I could dedicate himself fully to develop the country in peace. He established a Cathedral in Vác, a church in Mogyoród and an Abbey in Garamszentbenedek. At Christmas Eve in 1076 he announced in tears his resignation from the throne in the Church of Szekszárd. Neither did the Hungarians accept his resignation, nor Solomon as king, not even when Géza I died on 25th April 1077. They helped Géza’s brother Ladislaus to the throne. Not much information is available about his death that was caused by an unknown disease which assumes poisoning. He was buried in the Cathedral of Vác.