Maharao is a variation on the Indian (mainly Hindu) royal title Maharaja, also meaning 'great king' in Hindi. It is composed of Maha- 'great' and the royal title Rao, a variation on Raja.
The gun salutes enjoyed by princely states that acceded to the Dominion of India on 14 August 1947, included the following Maharaos:
(probably quite incomplete)
"Maharao" is also used as a given name and a surname in India: