Paul writes to the Corinthians:
Who is this man?
16But thanks be to God, who put into the heart of Titus the same earnest care I have for you. 17For he not only accepted our appeal, but being himself very earnest he is goingd to you of his own accord. 18With him we are sending the brother who is famous among all the churches for his preaching of the gospel. 19And not only that, but he has been appointed by the churches to travel with us as we carry out this act of grace that is being ministered by us, for the glory of the Lord himself and to show our good will.
Who is this man?