Justus

"(1.) Another name for Joseph, surnamed Barsabas. He and Matthias" "are mentioned only in Acts 1:23. "They must have been among the" "earliest disciples of Jesus, and must have been faithful to the" end; they must have been well known and esteemed among the "brethren. What became of them afterwards, and what work they" "did, are entirely unknown" (Lindsay's Acts of the Apostles)." "(2.) A Jewish proselyte at Corinth, in whose house, next door to "the synagogue, Paul held meetings and preached after he left the" synagogue (Acts 18:7). "(3.) A Jewish Christian, called Jesus, Paul's only "fellow-labourer at Rome, where he wrote his Epistle to the" Colossians (Col. 4:11).

Definition of Justus:
"just or upright"