Q: Who was the father of Prithviraj Chauhan III?  

Prithviraj was born to the Chahamana king Someshvara and queen Karpuradevi. Both Prithviraj and his younger brother Hariraja were born in Gujarat, where their father Someshvara was brought up at the Chaulukya court by his maternal relatives. According to Prithviraja Vijaya, Prithviraj was born on the 12th day of the Jyeshtha month. The text does not mention the year of his birth, but provides some of the astrological planetary positions at the time of his birth, calling them auspicious. Based on these positions and assuming certain other planetary positions, Dasharatha Sharma calculated the year of Prithviraj's birth as 1166 CE (1223 VS).

Prithviraja III (reign. c. 1178–1192 CE ), popularly known as Prithviraj Chauhan or Rai Pithora in the folk legends, was an Indian king from the Chahamana (Chauhan) dynasty. He ruled Sapadalaksha, the traditional Chahamana territory, in present-day north-western India. He controlled much of the present-day Rajasthan, Haryana, and Delhi; and some parts of Madhya Pradesh and Uttar Pradesh. His capital was located at Ajayameru (modern Ajmer), although the medieval folk legends describe him as the king of India's political center Delhi to portray him as a representative of the pre-Islamic Indian power.

Early in his career, Prithviraj achieved military successes against several neighboring Hindu kingdoms, most notably against the Chandela king Paramardi. He also repulsed the early invasions by Muhammad of Ghor, a ruler of the Muslim Ghurid dynasty. However, in 1192 CE, the Ghurids decisively defeated Prithviraj at the Second battle of Tarain. His defeat at Terain is seen as a landmark event in the Islamic conquest of India and has been described in several semi-legendary accounts, most notably the Prithviraj Raso.