Easton's Bible Dictionary (1897)
Son of Saba, the surname (1) of Joseph, also called Justus (Acts 1:23), some identify him with Barnabas; (2) of Judas, who was a “prophet.” Nothing more is known of him than what is mentioned in Acts 15:32.
Smith's Bible Dictionary (1863)
(son of Sabas or rest). [Joseph BARSABAS; Judas BARSABAS]
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
BAR'SABAS (son of Saba), the name of two men. Joseph Barsabas, surnamed Justus, was one of the two candidates for the vacancy in the apostleship occasioned by the apostasy of Judas. Acts 1:23. Some identify him with Joses Barnabas, the companion of Paul. See preceding article. Judas Barsabas. Acts 15:22. He was appointed to accompany Paul and Barnabas from Jerusalem to Antioch on an important embassy. He is called one of "the chief among the
brethren," but is otherwise unknown. Some commentators infer from the surname that he was a brother of Joseph Barsabas,
Hitchcock's Bible Names (1869)
son of return; son of rest