（Πειρήν), the name of two mythical personages, one the father of Io, commonly called Inachus (Apollod. 2.1.2), and the other a son of Glaucus, and brother of Bellerophon. (Apollod. 2.3.1.) [L.S]
William Smith. A Dictionary of Greek and Roman biography and mythology. London. John Murray: printed by Spottiswoode and Co., New-Street Square and Parliament Street. In the article on Soranus, we find: "at this present time (1848)" and this date seems to reflect the dates of works cited. 1873 - probably the printing date.