Cross reference
Acts 1:23
23 And they appointed two, Joseph called Barsabas, who was surnamed Justus, and Matthias.
Acts 15:22
22 Then pleased it the apostles and elders with the whole church, to send chosen men of their own company to Antioch with Paul and Barnabas; namely, Judas surnamed Barsabas and Silas, chief men among the brethren:
Acts 1:26
26 And they gave forth their lots; and the lot fell upon Matthias; and he was numbered with the eleven apostles.