The Sinhalese monarchy has its origins in the settlement of North Indian Indo-Aryan immigrants to the island of Sri Lanka.
The person who was in possession of the Tooth Relic thereafter would be the rightful ruler of the country.
This is usually occurred through the usurpation of the throne.
This list should be used with the following factors kept in mind.
the monarch held absolute power and succession was hereditary.
The monarchy comprised the reigning monarch, his or her family, and the royal household which supports and facilitates the monarch in the exercise of his royal duties and prerogatives.