NET
20 And in this way I desire to preach where Christ has not been named, so as not to build on another person’s foundation,
Darby
20 and so aiming to announce the glad tidings, not where Christ has been named, that I might not build upon another's foundation;
KJV
20 Yea, so have I strived to preach the gospel, not where Christ was named, lest I should build upon another man's foundation: