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.
Easton’s Bible Dictionary
Barsabas
Name meaningson of return; son of rest
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.