What is "pahlavas"

The Pahlavas are a people mentioned in ancient Indian texts like the Manu Smriti, various Puranas, the Ramayana, the Mahabharata, and the Brhatsamhita. In some texts the Pahlavas are also mentioned as "Pallavas": While the Vayu Purana distinguishes between Pahlava and Pahnava, the Vamana Purana and Matsya Purana refer to both as Pallava. The Brahmanda Purana and Markendeya Purana refer to both as Pahlava or Pallava. Bhishama Parava Mahabharata 6.11.66 . of the Mahabharata also does not distinguish between the Pahlavas and Pallavas. The Pahlavas are said to be same as the Parasikas. According to P. Carnegy, the Pahlava are probably those people who spoke Paluvi or Pehlvi, that is the Parthian language. Buhler similarly suggests Pahlava is an Indic form of Parthava meaning ' Parthian'. In the 4th century BCE, Vartika of Katyayana mentions the Sakah-Parthavah demonstrating an awareness of these Saka-Parthians, probably by way of commerce.