What is dating 1840 mean
The name "Sinhalé" was used when Kandasamy was crowned "Sri Wikrama Rajasinghe".
The 1815 treaty between the English and the `Adigars' of the Kandyian kingdom use the name Sinhalé therein.
In modern parlance, the English were brought in by the Kandyans to establish "human Rights"! King Panduwas Dev (Pandukabhaya, 4 century BCE) had divided the country into three provinces, viz., Phiti rata or Raja rata, north of the Mahaweli Ganga and Daduru Oya, Rohana or Ruhuna being south of the Mahaweli and extending up to Kalu ganga, while Maya rata extended from the Kalu Ganga to Deduru oya.
These kingdoms were governed by Yuvarajas (Viceroys) to whome power was delegated by the King.
The Romans used names like Salendiv (Cerendiv) closely related to the Greek name Salaka.