Nain Singh Thapa or Nayan Singh Thapa was a Nepalese Kaji (minister) and a military general. He died in the offensive campaign of Kangra from bullet injury. He was the owner of the Thapathali Durbar temple complex.
Poem, and portrait of the event of the death of Kaji Nain Singh Thapa in the conquest of Garhwal, by Garhwali Poet Mola Ram
Kaji was a title and position used by nobility of Gorkha Kingdom (1559–1768) and Kingdom of Nepal between 1768 and 1846. Many other contemporary kingdoms used the same title for their ministers.
Kaji Vamshidhar Kalu Pande, Kaji of the Gorkha Kingdom and one of the widely known Kaji from Nepal