his circumnavigation of the globe) cites it in his work Relazione del primo viaggio intorno al mondo (1524–1525) as Camogia. Scholar George Coedes refers to a 10th-century inscription of a Cambodian dynastic legend in which the hermit Kambu Swayambhuva and the celestial nymph Mera unite and establish the Cambodian Solar royal dynasty (Kambu-Mera), that begins with the Chenla ruler Srutavarman and his son Sreshthavarman. Coedes suggests that the Kambu Swayambhuva legend has its origins in southern India, as a version of the Kanchi Pallava dynasty creation myth. Colloquially, Cambodians refer to their country as either Srok Khmer ( , ; meaning "Land of the Khmers"), or the slightly more formal (, ; "Country of Kampuchea"). The name Cambodia is used most often in the Western world while Kampuchea is more widely used in the East. History Pre-history There exists sparse evidence for a Pleistocene human occupation of present-day Cambodia, which includes quartz and quartzite pebble tools found in terraces along the Mekong River, in Stung Treng and Kratié provinces, and in Kampot Province, although their dating is unreliable. Some slight archaeological evidence shows communities of hunter-gatherers inhabited the region during Holocene: the most ancient archaeological discovery site in Cambodia is considered to be the cave of Laang Spean, in Battambang Province, which belongs to the Hoabinhian period. Excavations in its lower layers produced a series of radiocarbon dates around 6000 BC. Upper layers in the same site gave evidence of transition to Neolithic, containing the earliest dated earthenware ceramics in Cambodia. Archaeological records for the period between Holocene and Iron Age remain equally limited. A pivotal event in Cambodian prehistory was the slow penetration of the first rice farmers from the north, which began in the late third millennium BC. The most curious prehistoric evidence in Cambodia are the various "circular earthworks" discovered in the red soils near Memot and in the adjacent region of Vietnam in the latter 1950s. Their function and age are still debated, but some of them possibly date from second millennium BC. Other prehistoric sites of somewhat uncertain date are Samrong Sen (not far from the ancient capital of Oudong), where the first investigations began in 1875, and Phum Snay, in the northern province of Banteay Meanchey. An excavation at Phum Snay revealed 21 graves with iron weapons and cranial trauma which could point to conflicts in the past, possible with larger cities in Angkor.