The name has been attested in Avesta as Haosrauuaŋha (𐬵𐬀𐬊𐬯𐬭𐬀𐬎𐬎𐬀𐬢𐬵𐬀)[1] and Haosrauuah, as the name of the legendary Iranian king Kay Khosrow.
The Old Armenian form was Khosrov (Խոսրով), derived from Parthian, and was held by several rulers of the Arsacid dynasty of Armenia.
Notable as to the use of Khosrow as a title is the father of Mirian III of Iberia who was known as k'asre (Old Georgian).
This led to confusion, as some historians thought that Mirian III must therefore be the son of a Sasanian ruler, and not a Parthian one.
The name has been variously transliterated as follows: Husrō, Husrōy, Xusro, Khusro, Husrav, Husraw, Khusrau, Khusraw, Khusrav, Xusraw, Xusrow, Xosrow, Xosro.