Tomara (also called Tomar, Tomer, Tanwar and Tuar) is a clan, some members of which ruled parts of North India at different times. People belonging to the Tomara clan are found among the Rajputs, Jats and Gurjars  of northern India.
The Tomara Rajput-Gurjar clan claim descent from the mythical Chandravanshi dynasty, numbering the Mahabharata warrior Arjuna among their forebears. They ruled in Delhi from around 736CE - 1115CE and also in Gwalior (1438-1486) and Rajasthan.
The establishment of Delhi as a political centre during the early medieval period was the work of the Rajput Tomara ruler Anangpal Tomar (Anangapala), although Rajasthani bardic stories that claim the involvement of Vasuki, a serpent demon, in the process are myths. Evidence of their time in Delhi still exists; for example, a fort and dam in the village of Anangpur and the remains of Lal Kot, which was later enhanced by the Chauhan rulers who supplanted the Tomars. Other possible evidence is less certainly attributed and the Mehrauli pillar that is traditionally said to have been erected by a Tomar ruler may in fact have been moved to its present location from elsewhere.
The Tomara dynasty of Delhi lasted until the demise of Anangpal Tomar, who was responsible for the construction of Lal Kot, a fortified wall around the city, likely in reaction to the raids of Mahmud of Ghazni. This is one of the oldest defence structures in Delhi. Anangpal Tomar appointed his grandson (daughter's son, and son of King of Ajmer), Prithviraj Chauhan, as the heir-apparent
The Chauhan dynasty of Ajmer was able to firmly establish control by the mid-12th century.
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In the contemporary Delhi, there are about 75 villages inhabited by the Gujars out of which 12 villages happened to be in Mehrauli where Gurjar belonging to Tomar clan dwell, who call themselves 'Tanwar'.
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