The very site hillock Olasuni Gumpha or Olasuni Pahada is named after the sovereign of four hands Buddhist goddess Prajnaparamita who turned in to hinduised goddess and called by the local people Olasuni Devi.
The goddess hold Akshyamala and a Khanda (sword) in the upraised right and left hands and Dharmachakra Pravartana Mudra in the principal pair of hands. The goddess worshiped by Buddhist monks inside the gumpha known as Olasuni or Sidha Gumpha till the 12th/&13th century AD, with decline of Buddhism in later period, the hillock became covered by hanging trunks of banyans tree, knows as Bara Ohala.
According to the term Ohala,the hanging state, perhaps the local people called this hillock as Ohalasuni,later that has been converted into Olasuni.Since that time the goddess has been widely known as Olasuni Devi and the Cave, as Olasuni gumpha and hillock Olasuni pahada. Even during arrival of Santha Arakhita in 18th century A.D, The hillock also named“Olasuni Pahada” as Arakhita Das composed in his bhajan, with an apple to the goddess “Olasuni Giribara”. Since that time the hillock is calling as Olasuni Gumpha Pahada.