Comparison with the sacred texts of
Zoroastrianism, a distinct religion with the same origins, shows the antiquity of terms for priests such as
*atharwan (
Vedic atharvan; cognate to
Avestan ) and
*zhautar (Ved.
hotar; Av. ) 'invoker, sacrificer'. While
*zhautar is well understood, the original meaning of
*atharwan is unknown. The word
atharvan appears in the Rig Veda (e.g., in RV 6.16.13 where Agni is said to have been churned by Atharvan from the mind of every poet). In the Younger Avesta, appears in a context that suggests "missionary," perhaps by metathesis from Indo-Iranian
*arthavan "possessing purpose." However, a recent theory indicates that Proto Indo-Iranian
*atharwan likely represents a substrate word from the unknown language of the BMAC civilization of Central Asia. It can be analyzed as BMAC
*athar- plus the Indo-Iranian possessive suffix
*-wan, in which case
*atharwan would be "one who possesses
*athar". Though the meaning of
*athar is unknown,
Pinault speculates that it meant "superior force" and connects it to the Tocharian word for "hero". In the
Upanishads, appears for example in , a compound of and , either two eponymous rishis or their family names. In present-day Indian Zoroastrian (
Parsi) tradition the word
athornan is used to distinguish the priesthood from the laity (the
behdin). These subdivisions (in the historical Indian context,
castes), and the terms used to describe them, are relatively recent developments specific to Indian Zoroastrians and although the words themselves are old, the meaning that they came to have for the Parsis are influenced by their centuries-long coexistence with Hinduism. It appears then that the Indian Zoroastrian priests re-adopted the older (in preference to the traditional, and very well attested derivative
āsron) for its similarity to Hinduism's , which the Parsi priests then additionally assumed was derived from Avestan
ātar 'fire'. This folk etymology may "have been prompted by what is probably a mistaken assumption of the importance of fire in the ancient Indo-Iranian religion". The division of priestly functions among the Hotar, the Udgatar and the Adhvaryu has been compared to the
Celtic priesthood as reported by
Strabo, with the
Druids as high priests, the
Bards doing the chanting and the
Vates performing the actual sacrifice. ==See also==