Boyd’s Bible Dictionary:
(free). Emancipated Jewish slaves; freedman (Acts 6:9).
Concise Bible Dictionary:
These are supposed to have been Jews who after having been captured by the Romans had been set at liberty: hence their name. It is well known that there were such. They formed a party at Jerusalem, and were among those who persecuted Stephen (Acts 6:9).
Strong’s Dictionary of Greek Words:
Transliteration:
Libertinos
Meaning:
of Latin origin; a Roman freedman
Jackson’s Dictionary of Scripture Proper Names:
freedmen
Potts’ Bible Proper Names:
Free ones; freedmen:―emancipated Jewish slaves; a sect, Acts 6:9. {Libertini}