The existence of Hairan was established by the discovery of a lead seal (code named RTP 736).[note 1][1] The seal bears the images of two priests, one on each side.[2] On one of the sides, the name of Odaenathus' son and successor Vaballathus was engraved under the image as a legend, while the name of Hairan was engraved on the other side.[2] The name of Odaenathus was engraved on both sides.[2] No name of a mother was engraved and the seal is undated.[1]