Paan Singh Tomar maybe divided into Paan (beetle) Singh (Lion) and Tomar (a Kshatriya surname in India), but then it's not the actual 'meaning' of the word. Paan Singh Tomar was a runner who was a steeplechase winner at Indian National Games for seven years in a row and then gave up running and his post in army and became a rebel, creating havoc in Chambal Valley.
As for the movie Paan Singh Tomar, the director Tigmanshu Dhulia researched for two years and found the history of Paan Singh Tomar from his native village Bhind.
(Source: Wikipedia)