Libertine

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 6:99Then there arose certain of the synagogue, which is called the synagogue of the Libertines, and Cyrenians, and Alexandrians, and of them of Cilicia and of Asia, disputing with Stephen. (Acts 6:9)).

Strong’s Dictionary of Greek Words:

Number:
3032 (find all occurrences in KJV Bible)
Greek:
Λιβερτῖνος
Transliteration:
Libertinos
Phonic:
lib-er-tee’-nos
Meaning:
of Latin origin; a Roman freedman
KJV Usage:
Libertine

Jackson’s Dictionary of Scripture Proper Names:

freedmen

Potts’ Bible Proper Names:

Free ones; freedmen:―emancipated Jewish slaves; a sect, Acts 6:9. {Libertini}