|Easton's Bible Dictionary|
Increasing, probably one of the seventy disciples of Christ. He was one of Paul's assistants (2 Timothy 4:10), probably a Christian of Rome.
Int. Standard Bible Encyclopedia
kres'-enz (Kreskes, "increasing"): An assistant of Paul, mentioned in 2 Timothy 4:10 as having gone to Galatia. That he was one of the Seventy, and that he founded the church in Vienna in Gaul, are traditions without any trustworthy basis.
Crescens (1 Occurrence)
2 Timothy 4:10 for Demas left me, having loved this present world, and went to Thessalonica; Crescens to Galatia, and Titus to Dalmatia. (WEB KJV WEY ASV BBE DBY WBS YLT NAS RSV NIV)