Cross reference
Acts 1:23
23 And they put forward two, Joseph called Barsabbas, who was surnamed Justus, and Matthias.
Acts 15:22
22 Then it seemed good to the apostles and the elders, with the whole church, to choose men out of their company, and send them to Antioch with Paul and Barnabas; `namely', Judas called Barsabbas, and Silas, chief men among the brethren:
Acts 1:26
26 And they gave lots for them; and the lot fell upon Matthias; and he was numbered with the eleven apostles.