I I thank God (ευχαριστω τω θεω). See verse 1. Corinthians 1:4, though uncertain if τω θεω is genuine here.

Save Crispus and Gaius (ε μη Κρισπον κα Γαιον). Crispus was the ruler of the synagogue in Corinth before his conversion (Acts 18:8), a Roman cognomen, and Gaius a Roman praenomen, probably the host of Paul and of the whole church in Corinth (Romans 16:23), possibly though not clearly the hospitable Gaius Rev 3. John 1:5; 3. John 1:6. The prominence and importance of these two may explain why Paul baptized them.