Noun desmios (prisoner) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Matthew

27: 15Now at the festival the governor was accustomed to release a prisoner (desmios) for the crowd, anyone whom they wanted.
27: 16At that time they had a notorious prisoner (desmios), called Jesus Barabbas.

Mark

15: 6Now at the festival he used to release a prisoner (desmios) for them, anyone for whom they asked.

Acts

16: 25About midnight Paul and Silas were praying and singing hymns to God, and the prisoners (desmios) were listening to them.
16: 27When the jailer woke up and saw the prison doors wide open, he drew his sword and was about to kill himself, since he supposed that the prisoners (desmios) had escaped.
23: 18So he took him, brought him to the tribune, and said, "The prisoner (desmios) Paul called me and asked me to bring this young man to you; he has something to tell you."
25: 14Since they were staying there several days, Festus laid Paul's case before the king, saying, "There is a man here who was left as prisoner (desmios) by Felix.
25: 27for it seems to me unreasonable to send a prisoner (desmios) without indicating the charges against him."
28: 17Three days later he called together the local leaders of the Jews. When they had assembled, he said to them, "Brothers, though I had done nothing against our people or the customs of our ancestors, yet I am a prisoner (desmios) in Jerusalem and handed over to the Romans.