a Roman cognomen, properly signified a person whose nose turned up (Festus, s.v. Cic. de Nat. Deor. 1.29).
The names Silo, Silius, and Silanus appear to be all connected with this name.
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.