|Easton's Bible Dictionary|
Second, a Christian of Thessalonica who accompanied Paul into Asia (Acts 20:4).
Int. Standard Bible Encyclopedia
se-kun'-dus (Westcott-Hort Greek text Se'koundos, Textus Receptus of the New Testament, Sekou'ndos): A Thessalonian who was among those who accompanied Paul from Greece to Asia (Acts 20:4). They had preceded Paul and waited for him at Troas. If he were one of the representatives of the churches in Macedonia and Greece, entrusted with their contributions to Jerusalem (Acts 24:17 2 Corinthians 8:23), he probably accompanied Paul as far as Jerusalem. The name is found in a list of politarchs on a Thessalonian inscription.
Secundus (1 Occurrence)
Acts 20:4 These accompanied him as far as Asia: Sopater of Beroea; Aristarchus and Secundus of the Thessalonians; Gaius of Derbe; Timothy; and Tychicus and Trophimus of Asia. (WEB KJV WEY ASV BBE DBY WBS YLT NAS NIV)