Initially, the kingdom was identified only through its location Yawadvipa (Java island) as mentioned in Canggal inscription (732). The inscription mentioned Rakai Mataram Sang Ratu Sanjaya (King Sanjaya, the Rakai (lord) of Mataram). The earlier historians such as Soekmono, identify this kingdom as Mataram, a historic geographical name to identify the plain south of Mount Merapi in central Java, roughly corresponds to modern Muntilan (where the Canggal temple on Gunung Wukir hill is located), Yogyakarta, Sleman and Bantul Regency. This is based on the locations where large numbers of candi were discovered in and around Prambanan Plain. The etymology of the name Mataram derived from a Sanskrit term for mother.