Phrygia, and Pamphylia - These were also two provinces of Asia Minor. Phrygia was surrounded by Galatia, Cappadocia, and Pisidia. Pamphylia was on the Mediterranean, and was bounded north by Pisidia. The language of all these places was doubtless the Greek, more or less pure.
In Egypt - This was that extensive country, well known, on the south of the Mediterranean, watered by the Nile. It extends 600 miles from north to south, and from 100 to 120 miles east and west. The language used there was the Coptic tongue. At present the Arabic is spoken. Vast numbers of Jews dwelt in Egypt, and many from that country would be present at the great feasts at Jerusalem. In this country the first translation of the Old Testament was made, which is now called the Septuagint.
In the parts of Libya - Libya is a general name for Africa. It properly denoted the region which was near to Egypt; but the Greeks gave the name to all Africa.
About Cyrene - This was a region about 500 miles west of Alexandria in Egypt. It was also called Pentapolis, because there were in it five celebrated cities. This country now belongs to Tripoli. Great numbers of Jews resided here. A Jew of this place, Simon by name, was compelled to bear our Saviour's cross after him to the place of crucifixion, Matthew 27:32; Luke 23:26. Some of the Cyrenians are mentioned among the earliest Christians, Acts 11:20; Acts 13:1. The language which they spoke is not certainly known.
Strangers of Rome - This literally means "Romans dwelling or tarrying," that is, at Jerusalem. It may mean either that they were permanently fixed, or only tarrying at Jerusalem - ὁι ἐπιδημοῦντες Ῥωμαῖοι hoi epidēmōuntes Rōmaioi. They were doubtless Jews who had taken up their residence in Italy, and had come to Jerusalem to attend the great feasts. The language which they spoke was the Latin. Great numbers of Jews were at that time dwelling at Rome. Josephus says that there were eight synagogues there. The Jews are often mentioned by the Roman writers. There was a Jewish colony across the Tiber from Rome. When Judea was conquered, about 60 years before Christ, vast numbers of Jews were taken captive and carried to Rome. But they had much difficulty in managing them as slaves. They pertinaciously adhered to their religion, observed the Sabbath, and refused to join in the idolatrous rites of the Romans. Hence, they were freed, and lived by themselves across the Tiber.
Jews - Native-born Jews, or descendants of Jewish families.
Proselytes - Those who had been converted to the Jewish religion from among the Gentiles. The great zeal of the Jews to make proselytes is mentioned by our Saviour as one of the special characteristics of the Pharisees, Matthew 23:15. Some have supposed that the expression "Jews and proselytes" refers to the Romans only. But it is more probable that reference is made to all those that are mentioned. It has the appearance of a hurried enumeration; and the writer evidently mentioned them as they occurred to his mind, just as we would in giving a rapid account of so many different nations.

Phrygia - A country in Asia Minor, southward of Pontus.
Pamphylia - The ancient name of the country of Natolia, now called Caramania, between Lycia and Cilicia, near the Mediterranean Sea.
Egypt - A very extensive country of African bounded by the Mediterranean on the north; by the Red Sea and the Isthmus of Suez, which divide it from Arabia, on the east; by Abyssinia or Ethiopia on the south; and by the deserts of Barca and Nubia on the west. It was called Mizraim by the ancient Hebrews, and now Mesr by the Arabians. It extends 600 miles from north to south; and from 100 to 250 in breadth, from east to west.
Libya - In a general way, among the Greeks, signified Africa; but the northern part, in the vicinity of Cyrene, is here meant.
Cyrene - A country in Africa on the coast of the Mediterranean Sea, southward of the most western point of the Island of Crete.
Strangers of Rome - Persons dwelling at Rome, and speaking the Latin language, partly consisting of regularly descended Jews and proselytes to the Jewish religion.

Phrygia, and Pamphylia, in Egypt, and in the parts of Libya about Cyrene, and strangers of Rome, (f) Jews and proselytes,
(f) By Jews he means those that were both Jews by birth and Jews by profession of religion, though they were born in other places: and these latter ones were proselytes, who were born Gentiles, and embraced the Jewish religion.

Phrygia, and Pamphylia, in Egypt,.... Phrygia was a country in Asia, and had part of Galatia on the north, Lycaonia, Pisidia, and Mygdonia on the south, and on the east Cappadocia (x); here the Apostle Paul afterwards travelled, and strengthened the Christians; see Acts 16:6. Pamphylia, now called Setilia, is another country in Asia, formerly called Mopsopia (y); which had on the west Lycia, and part of Asia, on the north Galatia, on the east Cilicia, and part of Cappadocia, and on the south the sea of Pamphylia (z), of which mention is made in Acts 27:5. The chief city in it was Perga, where was a temple of Diana (a), and here the Apostle Paul also was; see Acts 13:13. Others of these sojourning Jews lived in Egypt, which was a large country in Africa; which had on the east the deserts of Arabia, on the west Libya, on the south Ethiopia, and on the north the Mediterranean sea; hither many Jews were carried captive by Ptolomy Lagus, and these spoke the Egyptian language:
and in the parts of Libya about Cyrene; there were others at Jerusalem, which came from hence, The Arabic version reads this clause, "and in the parts of Africa, which is our country"; and Pliny says (b), the Greeks call Africa, Libya. The Jews say (c), Libya in Egypt; and for proselytes from Libya, they wait three generations; that is, before they receive them: Cyrene, or Cyreniaca, which is no other than upper Libya, is called by Pliny (d), the Pentapolitan country, from the five cities in it; Berenice, Arsinoe, Ptolemais, Apollonia, and Cyrene: to these are added,
and strangers of Rome, Jews and proselytes; that is, as the Syriac version renders it, "those that came from Rome"; to which the Arabic agrees: they were natives and inhabitants of the city of Rome, though now they were at Jerusalem; and some of these were Jews by birth, and lineal descent, though born at Rome; and others were such as were proselytes of righteousness, who were originally Gentiles, but were now circumcised, and had embraced the Jewish religion; concerning such; see Gill on Matthew 23:15. These doubtless spoke in the Roman, or Latin tongue,
(x) Plin. l. 5. c. 32. (y) Ib. c. 27. (z) Ptolom. l. 5. c. 5. (a) Plin. l. 5. c. 27. Ptolom, ib. &. Mela, l. 1. c. 14. (b) Plin. l. 5. in principio. (c) T. Hieros. Kilaim, fol. 31. 3. & Sabbat, fol. 7. 2. (d) L. 5. c. 5.

Phrygia and Pamphylia. Parts of what is called Asia Minor.
Egypt. The great African province where many ten thousands of Jews had their home.
Parts of Libya. Of Africa.
About Cyrene. A great Grecian city on the coast west of Egypt. It is said that one-fourth of the population of Cyrene was Jewish.
Strangers of Rome. Roman Jews sojourning at Jerusalem.
Proselytes. Gentiles who had been converted to Judaism.

Roman sojourners - Born at Rome, but now living at Jerusalem. These seem to have come to Jerusalem after those who are above mentioned. All of them were partly Jews by birth, and partly proselytes.