Question 501

The etymology of X is not certain. Acording to some, it is thought to have driven from 'Trilinga' as in the 'Trilinga Desa', 'the country of the three lingas'. According to hindi legend, it is the land between three shiva temples namely Kaleshwaram, Srisailam, and Draksharamam. Trilinga desa formed the posible boundaries of X. 'X'? (if the flag of a certain organisation is of any help?!) And if possible the actual etymology which i certainly don't know!