From Franciscan Media we learn about Timothy and Titus.
"Timothy had a Greek father and a Jewish mother named Eunice. Being the product of a 'mixed' marriage, he was considered illegitimate by the Jews. It was his grandmother, Lois, who first became Christian. Timothy was a convert of Paul around the year 47 and later joined him in his apostolic work. He was with Paul at the founding of the Church in Corinth. During the 15 years he worked with Paul, he became one of his most faithful and trusted friends. He was sent on difficult missions by Paul—often in the face of great disturbance in local churches which Paul had founded."
"Titus has the distinction of being a close friend and disciple of Paul as well as a fellow missionary. He was Greek, apparently from Antioch. Even though Titus was a Gentile, Paul would not let him be forced to undergo circumcision at Jerusalem. Titus is seen as a peacemaker, administrator, great friend. Paul’s second letter to Corinth affords an insight into the depth of his friendship with Titus, and the great fellowship they had in preaching the gospel."
Saints Timothy and Titus, pray for us.