Justus

Justus (Latin, meaning just or upright) is the name of three individuals in the New Testament. The first was Joseph Barsabas Justus, nominated alongside Matthias to fill the vacancy among the Twelve created by Judas Iscariot's death; when the lot fell on Matthias, Barsabas Justus disappears from the narrative (Acts 1:23–26). The second was Titius Justus (or Titus Justus), a God-fearing Gentile in Corinth whose house stood next door to the synagogue; after Jewish opposition forced Paul out of the synagogue, the apostle moved his teaching base to Justus's house, and many Corinthians believed and were baptized (Acts 18:7).

The third was Jesus Justus, a Jewish Christian in Rome who sent greetings to the Colossian church through Paul's letter (Col. 4:11). Paul identifies him, along with Aristarchus and Mark, as one of the few Jewish co-workers who had been a comfort to him during his imprisonment. The three occurrences of the name illustrate the Greco-Roman naming practice of adopting Latin cognomina expressing virtue, common among diaspora Jews and early Christians.