Boyd’s Bible Dictionary:
Jews settled in Parthia, that undefined country north of Media and Persia
(Acts 2:9).
Concise Bible Dictionary:
Inhabitants of Parthia, a country in the East, lying south of Hyrcania, north of Sagartia, and east of Media. Some Jews from thence were present in Jerusalem on the day of Pentecost (Acts 2:9). They were a very warlike people, they rode swift horses, and skilfully used the bow as they rode.
Strong’s Dictionary of Greek Words:
Meaning:
probably of foreign origin; a Parthian, i.e. inhabitant of Parthia
Jackson’s Dictionary of Scripture Proper Names:
a pledge (?)
Potts’ Bible Proper Names:
Exiled; an exile; horseman:―people of Parthia, Acts 2:9. {Exsulatus}