This morning in my readings I got to 2Cor8v18: "we are sending the brother who is famous among all the churches for his preaching of the gospel." The NIV states that the brother is "praised for his service to the gospel".
Here is a brother known for his service / preaching of the gospel but Paul sees no point in indentifying who he is.
There is something very appealing about being famous for your preaching of the gospel, because the gospel needs to be preached well. There is something very appealing about being well known for your service to the gospel, because Christ came to serve.
But what is even more appealing is being commended for your preaching & service but not having your name elevated... that is reserved for Jesus.