The 1823 English translation of Johann David Michaelis's Introduction to the New Testament, p46 reads:
Dr. Hoven, in a Corollary annexed to his dissertation, De Christianorum Saeculi primivitaet moribus, asserts that Sosthenes and Crispus were one and the same person. But, as St. Paul names Sosthenes, 1 Cor. i.1. and mentions Crispus, ver. 14 . of the same chapter, it is evidecet that they were different persons: for he would surely not have created an unnecessary confusion, in mentioning in so short a compass the very same person under two different names.
This is a very weak counter-argument. Crispus-Sosthenes was responsible for the conversion of many in Corinth (Acts 18:8) and had so much authority among the believers in Corinth that Paul chose to include him as his co-sender of 1 Corinthians. The readers of 1 Corinthians would surely then have known both names of Crispus-Sosthenes, so there was no risk of 'confusion'. In 1 Cor 1:14 Paul correctly calls him "Crispus" because he is referring to his baptism, which would have been before he was renamed.
Furthermore, Paul refers to Simon as both "Peter" and "Cephas" in Galatians.
