11 The Greek sentence continues v. 9 with the phrase “with Onesimus,” but this is awkward in English, so the verb “I sent” was inserted and a new sentence started at the beginning of v. 9 in the translation.
12 Grk “is of you.”
13 Grk “will make known to you.” This has been simplified in the translation to “will tell.”

In other versions

and with him Onesimus, our faithful and beloved brother, who is one of you. They will tell you of everything that has taken place here.

He is coming with Onesimus, our faithful and dear brother, who is one of you. They will tell you everything that is happening here.

He is coming with Onesimus, a faithful and dearly loved brother, who is one of you. They will tell you about everything here.

I am also sending Onesimus, a faithful and beloved brother, one of your own people. He and Tychicus will tell you everything that’s happening here.

together with Onesimus, my faithful and dear brother, who is one of you. They will make known to you all the circumstances here.

With Onesimus, a faithful and beloved brother, who is one of you. They shall make known unto you all things which are done here.

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