Indian historian (1863–1947)
Gaurishankar Hirachand Ojha (15 September, 1863– 17 April, 1947), born in Rohida village of Sirohi District, was a historian from the Indian state of Rajasthan. A prolific author, he wrote several books ( in Hindi ) on the history of Rajasthan and other historical subjects. Subsequent historians from Rajasthan have referred to him as "Guruvara Mahamahopadhyaya" (e.g. Dasharatha Sharma in "Early Chauhan Dynasties"). Ojha regarded "Kaviraj" Shyamaldas as his "guru" and worked under him as assistant secretary of the historical department, Udaipur
Early life and education.
Dr. Ojha was born in a Audichya Brahmins family, his father's name was Hirachand Ojha. His primary education was completed at his home and then he moved to Bombay for further education, where he learnt about Scripts, Archaeology and History. Thereafter, he came to Udaipur, where Maharana Fateh Singh appointed him as Head of State Archaeological Department. 
In 1908, Dr. Ojha was appointed as Head of Rajputana Museum, Ajmer. He worked on this post for 38 years. 
Authorship.
In 1894, Dr. Ojha published his "Bharatiya Prachin Lipimala" (the first book devoted to the palæography of India), a revised edition was published in 1918. Dr. Ojha penned "Solankiyon ka Itihasa" ("History of the Solanki") in 1907 and "Sirohi Rajya ka Itihasa" ("History: Kingdom of Sirohi") in 1911. In 1926, Ojha published the first book of his History of Rajputana series. Histories of the princely states of Udaipur, Jodhpur, Bikaner, Dungarpur, Banswara released over a twelve-year period (1929–1941). Ojha also wrote a biography of James Tod titled "Supraprasiddha itihaskara Karnala James Tod ka jivan charitra". A 1928 lecture series at the Hindustani Akademi, Allahabad was published as " Madhyakalina Bharatiya Sanskriti" and later translated into Urdu.