Cross reference
Acts 1:23
23 And they set two, Joseph called Barsabas, who was surnamed Justus, and Matthias,
Acts 15:22
22 Then it seemed good to the apostles and the elders, with the whole assembly, chosen men out of themselves to send to Antioch with Paul and Barnabas -- Judas surnamed Barsabas, and Silas, leading men among the brethren --
Acts 1:26
26 and they gave their lots, and the lot fell upon Matthias, and he was numbered with the eleven apostles.