The Apostle Paul
Colossians 4:7ESV·traditional attribution

Tychicus will tell you all about my activities. He is a beloved brother and faithful minister and fellow servant in the Lord.

John Calvin Reformed @genevareformer

7 My things. That the Colossians may know what concern he has for them, he confirms them, by giving them, in a manner, a pledge. For although he was in prison, and was in danger of his life, making care for himself a secondary matter, he consults for their interests by sending Tychicus to them.

Matthew Henry Presbyterian @wholebiblehenry

In the close of this epistle the apostle does several of his friends the honour to leave their names upon record, with some testimony of his respect, which will be spoken of wherever the gospel comes, and last to the end of the world. I. Concerning Tychicus, Col 4:7.

Commenting on Colossians 4:7-18

John Gill Reformed Baptist @doctorgill

All my state shall Tychicus declare unto you,.... This Tychicus was an Asian by birth; see Act 20:4. His name signifies "fortunate", and is the same with "Fortunatus" in Latin, which name is mentioned in Co1 16:17 whether he is the same person may be inquired. It is said that this Tychicus was one of the seventy disciples, and was afterwards bishop of Chalcedon.