Géza (1151–1210) was a Hungarian royal Prince, son of the King Géza II of Hungary. Prince Géza was brother of the King's Stephen III and Béla III of Hungary. He travelled to Holy Land during the Third Crusade with an army of 2.000 Hungarian warriors.
The Prince Géza was born in 1151, as the fourth son of the King Géza II of Hungary and his wife the Princess Euphrosyne of Kiev. After several suciveory conflicts after the death of the king Géza II, his elder son was crowned as Stephen II of Hungary (Prince Géza's brother). Géza II's two brothers tried to prevail and eventually were crowned first as Ladislaus II of Hungary, and after his death his younger brother as Stephen IV of Hungary. However, Géza II's son, Stephen recovered the power, and defeated Stephen IV on the battlefield. During the reign of Stephen III, the wars against the Byzantine empire continued. The emperor Manuel I Komnenos already confronted Géza II in many occasions, thus he was determined to expand his influence over Hungary (Manuel I's mother was Saint Piroska of Hungary, daughter of Saint Ladislaus I of Hungary, so he always had a great interest on this kingdom). Manuel and Stephen II finally reached a resolution, were they signed the peace in 1163, and the Hungarian King's younger brother Béla, had to be sent to Constantinople as assurance. Meanwhile, Stephen III ruled in Hungary, keeping on his court his mother Eufrosyne and his very other younger brother, the Prince Géza.
After Stephen III's death in 1172, the Prince Béla was called back from Constantinople to occupy the throne, before the Prince Géza did it first. Few months later, the Prince was crowned as Béla III of Hungary, which was not well seen by his own mother the Queen Eufrosyne and his brother Géza. Both started conspiring against Béla III for obtaining the Hungarian crown and after a couple of failed attempts, the King arrested them both. Eufrosyne was jailed but the Prince Géza succeeded on escaping and ran to Leopold V, Duke of Austria asking for protection. However, he turned it to the Hungarian King who jailed him again.
A year later, Prince Géza escaped again, and ran to Bohemia, but Sobeslaus II, Duke of Bohemia, also turned it to Béla III who sent him to prison. Prince Géza then remained in jail from 1177 to 1189 until the preparation for the Third Crusade. In 1189, Frederick I, Holy Roman Emperor arrived to the Hungarian Kingdom and was received by the King Béla III. After hearing about Prince Géza's predicament, the German emperor asked to Béla III to allow him to lead a small Hungarian army to the Crusade escorting his. The Hungarian King allowed his departure and 2000 Hungarian soldiers left to Holy Land.
After the failure of the Third Crusade and the death of the German emperor, Béla III ordered Géza and his men to return to Hungary, but the Prince and his guard decided to stay in Holy Land. It is known that Géza took a Byzantine noblewoman as wife between 1190 and 1191. Historians estimate that Géza's death was around 1210, because until then he is mentioned in Medieval Chronicles.