įrits Staal states that the text may be a compilation of poetry and knowledge that developed in two different regions of ancient India, the Kuru region in northern India and the Pancalas region of eastern India. However, notes Max Muller, the hymns of Atharvaveda existed by the time Chandogya Upanishad was completed (~700 BCE), but were then referred to as "hymns of Atharvangirasah". Olson states that the ultimate acceptance of Atharvaveda as the fourth Veda probably came in the 2nd half of the 1st millennium BCE. The early Buddhist Nikaya texts, for example, do not recognize Atharvaveda as the fourth Veda, and make references to only three Vedas. The acceptance of the Atharvanas hymns and traditional folk practices was slow, and it was accepted as another Veda much later than the first three, by both orthodox and heterodox traditions of Indian philosophies. The Rigveda, the verse 3.12.9.1 of Taittiriya Brahmana, the verse 5.32-33 of Aitareya Brahmana and other Vedic era texts mention only three Vedas. The ancient Indian tradition initially recognized only three Vedas. 900 BCE, while Michael Witzel gives a dating at, or slightly after, c. The Atharvaveda is also occasionally referred to as Bhrgvangirasah and Brahmaveda, after Bhrigu and Brahma respectively. Michael Witzel states the etymology of Atharvan is Proto Indo-Iranian *atharwan " priest, sorcerer", and it is cognate to Avestan āθrauuan "priest" and possibly related to Tocharian *athr, "superior force". The latter name Angiras which is linked to Agni and priests in the Vedas, states George Brown, may also be related to Indo-European Angirôs found in an Aramaic text from Nippur. Over time, the positive auspicious side came to be celebrated and the name Atharva Veda became widespread. The "Atharvan" and "Angiras" names, states Maurice Bloomfield, imply different things, with the former considered auspicious while the latter implying hostile sorcery practices. Each school called the text after itself, such as Saunakiya Samhita, meaning the "compiled text of Saunakiya". The oldest name of the text, according to its own verse 10.7.20, was Atharvangirasah, a compound of " Atharvan" and " Angiras", both Vedic scholars. The name Atharvaveda, states Laurie Patton, is for the text being "Veda of the Atharvāṇas". The Veda may be named, states Monier Williams, after the mythical priest named Atharvan who was first to develop prayers to fire, offer Soma, and who composed "formulas and spells intended to counteract diseases and calamities".