Everyone here has a write-up, drawn from the same records that explain the names while you read the text.
David
King of Israel, before the splitThe shepherd-poet who killed Goliath, outlasted Saul's jealousy, and united the tribes with Jerusalem as his capital. A man after God's own heart, yet his adultery with Bathsheba and its cover-up cost him dearly. God promised his throne would endure forever, the covenant the Messiah would fulfill.
1 Samuel 16-172 Samuel 5-72 Samuel 11-12Study → Joseph
Patriarch, ruler in EgyptJacob's favored son, sold into slavery by his brothers, imprisoned on a false accusation, and raised to second in Egypt because he could read dreams. When his brothers finally stood before him he said the line the whole story turns on: you meant it for evil, God meant it for good.
Genesis 37-50Exodus 1:5-8Deuteronomy 33:13-17
Joshua
Successor to MosesMoses' assistant and one of the two spies who came back from Canaan saying it could be taken. He led the crossing of the Jordan and the conquest, and at the end of his life made the whole nation choose openly whom they would serve.
Exodus 17:8-16Exodus 33:11Numbers 13-14
Mary
Mother of JesusA young woman in Nazareth who answered the angel's announcement with consent, and whose song of God lifting up the lowly is one of the earliest Christian hymns. She appears at the wedding in Cana, at the cross, and with the disciples in the upper room.
Luke 1:26-56John 2:1-11John 19:25-27
Peter
ApostleA Galilean fisherman who spoke first and thought later, walked on water and sank, confessed Jesus as the Christ, denied him three times, and was restored on a beach over breakfast. He preached the sermon at Pentecost and opened the door of the church to Gentiles at Cornelius' house.
Matthew 16:13-19Mark 1:16-18Luke 22:54-62
John
ApostleA fisherman called with his brother James, part of the inner three, and traditionally the author of the fourth Gospel, three letters, and Revelation. The Gospel calls him the disciple Jesus loved and places him at the cross, entrusted with Jesus' mother.
Mark 1:19-20John 19:26-27Acts 3:1-11
Judas Iscariot
Apostle who betrayed JesusOne of the twelve, who kept the money box and sold Jesus for thirty pieces of silver, then threw the money back into the temple and hanged himself. The Gospels report his motives sparingly and do not speculate.
Matthew 26:14-16Matthew 27:3-10Mark 14:10-11
Paul
Apostle to the GentilesA Pharisee trained under Gamaliel who persecuted the church until he was stopped on the road to Damascus. He then spent thirty years planting churches across the Roman world and writing the letters that make up roughly a third of the New Testament. He was a Roman citizen by birth, which is why he could appeal to Caesar.
Acts 9Acts 13-28Galatians 1:11-24
Barnabas
Apostle and companionA Levite from Cyprus whose nickname means 'son of encouragement,' which fits the two things he is best known for: vouching for Saul when the church was still afraid of him, and later splitting with Paul rather than give up on John Mark.
Acts 4:36-37Acts 9:26-27Acts 15:36-41
Stephen
First martyrOne of the seven chosen to serve the Greek-speaking widows, who preached a sweeping survey of Israel's history before the council and was stoned for it. Luke notes that the witnesses laid their coats at the feet of a young man named Saul.
Acts 6-7
Timothy
Paul's coworkerA young believer from Lystra with a Greek father and a Jewish mother, who traveled with Paul and was left in charge at Ephesus. Two of Paul's letters are addressed to him, and the second is the last one we have.
Acts 16:1-31 Timothy2 Timothy 1:5
Lydia
First convert in EuropeA dealer in purple cloth at Philippi, which was an expensive trade, who was worshiping by the river when Paul arrived. She was baptized with her household and opened her home as the base for the church there.
Acts 16:11-15, 40
Priscilla
Teacher and coworkerA tentmaker who, with her husband Aquila, hosted churches in their home in three cities and took the eloquent Apollos aside to explain the way of God more accurately. She is usually named first of the pair, which was unusual enough to be worth noticing.
Acts 18Romans 16:3-5
Simon Magus
Sorcerer in SamariaA magician with a following who believed and was baptized, then offered the apostles money for the power to give the Spirit. Peter's answer is blistering. His name gave English the word simony, the buying and selling of church office.
Acts 8:9-24
Agabus
Prophet in the early churchHe predicted a widespread famine, which prompted the first relief collection sent from Antioch to Judea, and later took Paul's belt, bound his own hands and feet with it, and warned him what waited in Jerusalem.
Acts 11:27-30Acts 21:10-11
The Ethiopian official
Treasurer of the KandakeA court official returning from Jerusalem, reading Isaiah aloud in his chariot and getting nowhere. Philip ran alongside, asked whether he understood it, and was invited up. They stopped at water and he was baptized, then went on his way rejoicing.
Acts 8:26-40
Cornelius
Roman centurion at CaesareaA God-fearing officer who prayed and gave alms, and whose vision and Peter's happened on the same day. When the Spirit fell on his household while Peter was still speaking, the argument about Gentiles was effectively settled by God before the church could vote on it.
Acts 10
Dorcas
Disciple at JoppaKnown for the coats and garments she made for widows, which the widows were holding up and showing Peter when he arrived after her death. She is the only woman in the New Testament called a disciple with the feminine form of the word.
Acts 9:36-42
Gamaliel
Pharisee and teacherThe most respected rabbi of his generation, and Paul's teacher. When the council wanted the apostles executed he counseled patience with an argument still quoted: if this is of human origin it will fail on its own, and if it is from God you will not be able to stop it.
Acts 5:33-39Acts 22:3
Apollos
Preacher from AlexandriaEloquent and mighty in the Scriptures, teaching accurately about Jesus but knowing only John's baptism. Priscilla and Aquila took him aside privately and filled in what he was missing, and he became a formidable public advocate.
Acts 18:24-281 Corinthians 3:4-6
Philip the evangelist
One of the sevenChosen to serve tables, he ended up preaching in Samaria, baptizing an Ethiopian official on a desert road, and settling in Caesarea, where Luke notes he had four unmarried daughters who prophesied.
Acts 6:5Acts 8:5-40Acts 21:8-9
Ananias and Sapphira
Who lied about the priceThey sold property, kept back part of the price, and presented the rest as the whole. Peter's charge is not that they gave too little but that they lied about it when they were under no obligation to give at all. Both fell dead, and great fear came on the church.
Acts 5:1-11
Silas
Paul's companionA leading man in the Jerusalem church who carried the council's decision to Antioch and then traveled with Paul after the split with Barnabas. He was beaten and jailed at Philippi and was singing at midnight when the earthquake came.
Acts 15:22-40Acts 16:19-34
Felix
Rome's men in ActsThe governors, kings, and officers who handle Paul's case. Felix keeps him two years hoping for a bribe. Festus inherits the problem and cannot work out what to write to Caesar. Agrippa II and his sister Bernice come to hear him out of curiosity.
Acts 18:12-17Acts 23:23-26Acts 24:22-27
Andrew
The rest of the TwelveThe apostles the gospels say least about. Andrew, Peter's brother, is the one who keeps bringing people to Jesus: his brother, the boy with the loaves, the Greeks who came asking. Thomas is remembered for one sentence of doubt and forgotten for another, let us also go, that we may die with him.
Matthew 10:2-4Mark 3:16-19Luke 6:14-16
Hamor
The prince of ShechemThe Hivite ruler of Shechem whose son violated Dinah and then asked to marry her. Jacob's sons agreed on condition that every male in the city be circumcised, and killed them all while they were recovering.
Genesis 33:19Genesis 34:1-31Genesis 49:5-7
Matthew
Apostle and tax collectorThe tax collector called from his booth at Capernaum, on the road running from Damascus to the coast. Mark and Luke call him Levi; Matthew's gospel calls him Matthew and adds the detail that he was a tax collector, which the others leave out of the apostle list.
Matthew 9:9-13Mark 2:13-17Luke 5:27-32
James
Three men of this nameJames son of Zebedee, John's brother, one of the inner three, and the first apostle martyred, killed by Herod Agrippa. James son of Alphaeus, of whom almost nothing is recorded. And James the brother of Jesus, who did not believe during the ministry and became the leader of the Jerusalem church.
Matthew 4:21Mark 3:17Luke 6:14-16
Caesar
The Roman emperorsA family name that became a title. Augustus orders the census in Luke 2. Tiberius reigns during the ministry. Claudius expels the Jews from Rome, which is how Paul meets Priscilla and Aquila. Nero is almost certainly the Caesar to whom Paul appealed and under whom he died.
Luke 2:1Luke 3:1Acts 18:2
Nicanor
Seleucid generalsThe commanders sent against Judas Maccabeus. Nicanor was defeated and killed at Adasa, and the anniversary was kept as a feast day for a time. Apollonius, Timotheus, and Gorgias lead other campaigns across 1 and 2 Maccabees.
1 Maccabees 3:38-411 Maccabees 7:26-492 Maccabees 15:28-36
Onias
High priests of the Greek periodThe men who held or bought the high priesthood in the years around the Maccabean crisis. Onias III was respected and was deposed by his brother Jason, who purchased the office and built a gymnasium in Jerusalem. Menelaus then outbid Jason, and Alcimus later took the post with Seleucid backing.
2 Maccabees 3:1-32 Maccabees 4:7-261 Maccabees 7:5-25