Final answer:
Silas and Barnabas were two companions of Paul who joined him in his missionary journeys, contributing to the spread of Christianity.
Step-by-step explanation:
Two people who traveled with Paul on his missionary journeys were Silas and Barnabas. Both are mentioned in the Acts of the Apostles as companions of Paul.
Silas, referred to in some Bible translations as Silvanus, joined Paul on his second missionary journey after a sharp disagreement between Paul and Barnabas over John Mark.
As for Barnabas, he was a close companion of Paul on his first missionary journey. They traveled together spreading the message of Christianity and establishing churches until their paths diverged.
These journeys contributed significantly to the spread of Christianity throughout the Greek and Roman cities of the ancient Mediterranean world.