Sinhalese people () are an Indo-Aryan ethnolinguistic group native to the island of Sri Lanka. They were historically known as Hela people (). They constitute about 75% of the Sri Lankan population and number more than 16.2 million. The Sinhalese identity is based on language, cultural heritage and nationality. The Sinhalese people speak Sinhala, an insular Indo-Aryan language, and are predominantly Theravada Buddhists, although a minority of Sinhalese follow branches of Christianity and other religions. Since 1815, they were broadly divided into two respective groups: The 'Up-country Sinhalese' in the central mountainous regions, and the 'Low-country Sinhalese' in the coastal regions; although both groups speak the same language, they are distinguished as they observe different cultural customs. According to the Mahavamsa and the Dipavamsa, a third–fifth century treatise written in Pali by Buddhist monks of the Anuradhapura Maha Viharaya in Sri Lanka, the Sinhalese descend from settlers who came to the island in 543 BCE from Sinhapura led by Prince Vijaya who mixed with the indigenous Yakka and later settlers from the Pandya kingdom. Etymology Sinhala is derived Sanskrit siṃhá, literally "lion" with the suffix -la, together meaning "abode of lions", referring to the prevalence of lions in earlier Sri Lankan history. The Mahavamsa records the origin of the Sinhalese people and related historical events. It traces the historical origin of the Sinhalese people back to the first king who mentioned in the documentary history of Sri Lanka, Vijaya, who is the son of Sinhabahu (Sanskrit meaning 'Sinha' (lion) + 'bahu' (hands, feet), the ruler of Sinhapura. Some versions suggest Vijaya is the grandson of Sinhabahu. According to the Mahavamsa, Sinhabahu was the son of princess Suppadevi of Vanga, who copulated with a lion and gave birth to a daughter called Sinhasivali and to a son, Sinhabahu, whose hands and feet were like the paws of a lion and who had the strength of a lion. King Vijaya, the lineage of Sinhabahu, according to the Mahavamsa and other historical sources, arrived on the island of Tambapanni (Sri Lanka) and gave origin to the lion people, Sinhalese. The story of the arrival of Prince Vijaya in Sri Lanka and the origin of the Sinhalese people is also depicted in the Ajanta caves, in a mural of cave number 17. History The early recorded history of the Sinhalese is chronicled in two documents, the Mahavamsa, written in Pāli around the fourth century