This name is frequently written Pactlus, but in inscriptions we only find Paccius, and the derivative Pacciauus also points to Paccius as the correct orthography.
It appears that the name was originally not Roman. [See Nos. 1 and 2.]
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.