Haug has interpreted angra in Yasna 43.15 as the Ahurians of pre-Zarathushtrian times. He connects this Avestan form with the angiras of the Vedas. There angiras means "messenger." Angareion is a Greek rendering of the Persian angaros "messenger" in Herodotu's Histories. These forms must obviously be related to the angra of the Yasna. Is the Persian angaros also where the Greek word angelos "angel" comes from after r > l shift?