Bigga Ji Jakhar (1301 - 1336) (also called Bigga Ji or Biggaji) is a folk-deity of Jangladesh area of Rajasthan. He was a Jat ruler of Jakhar gotra of a small democratic republic state. He was born in year 1301 AD at place called Riri, which was capital of Jakhars in present tahsil Dungargarh of the Bikaner district in Rajasthan, India. His great grandfather was Rao Lakhoji Chuhad and father was Rao Mehandji. His mother was Sultani daughter of Chuhadji Godara chieftain of Kapoorisar. He was a great warrior, protector of Hindu religion and cows. He was killed in war with Rath Muslims in the year 1336.
Biggaji had two wives: 1. Rajkunwar daughter of Chaudhary Khusal Singh Sinsinwar of Amarsar and 2. Meera daughter of Chaudhary Khidaji Meel of Malasar (Molaniya). Malasar village at present is in Bikaner tehsil, Bikaner district, Rajasthan. As per genealogy of Biggaji he had no issue from first wife Rajkunwar. From second wife Meera he had four sons, viz 1. Kunwar Alji, 2. Kunwar Jalji, 3. Kunwar Bahalji, 4. Kunwar Hansraoji. His daughter was Hariyal.
Jhakkar (जाखड़ ), son of Jai and eponym of a tribe in Multan.
Dilip Singh Ahlawat has mentioned it as one of the ruling Jat clans in Central Asia.
The Jat historian Hukum Singh Panwar (Pauria) writes that Jakhar is derived from Yaksha. This tribe Jakhar claim Jakha or Jakhu, known as Yaksha or Yakshu in Sanskrit, to be their most ancient eponymous progenitor. Hukum Singh Panwar further writes that Yakshas were one of the tribes who fought the last battle of Dasrajna War (the battle of ten kings) under the leadership of Dasa Raja named Bheda against Bharatas tribes on the banks of Yamuna.