Everyone here has a write-up, drawn from the same records that explain the names while you read the text.
Antiochus IV
Seleucid kingThe Greek king who tried to abolish Jewish worship: he outlawed the Sabbath and circumcision, plundered the temple, and set up a pagan altar on it. The revolt that answered him is what Hanukkah remembers. He called himself Epiphanes, meaning God manifest, and his critics called him Epimanes, the madman.
1 Maccabees 12 Maccabees 5-7Daniel 8:9-14
Josias
Greek forms of familiar namesThe deuterocanonical books, and the King James New Testament, often carry names in their Greek shapes: Josias is Josiah, Jeremias is Jeremiah, Elias is Elijah, Esaias is Isaiah, Noe is Noah, Booz is Boaz, Jonas is Jonah, Zorobabel is Zerubbabel, Nave is Nun.
Matthew 1:5-101 Esdras 1:1-331 Maccabees 2:42
Alexander the Great
The Greek conquerorNever named in the Hebrew Bible, but present in it. Daniel's goat from the west with a conspicuous horn, moving so fast it does not touch the ground, and whose horn breaks at the height of its power to be replaced by four, is read across traditions as Alexander and the four generals who divided his empire.
Daniel 8:5-8Daniel 8:21-221 Maccabees 1:1-9
Judas Maccabeus
The Maccabean revoltThe priest Mattathias and his sons, who revolted when Antiochus IV banned the practice of Judaism and installed a pagan altar in the temple. Judas, nicknamed Maccabeus, probably the hammer, retook Jerusalem and rededicated the temple, which is the origin of Hanukkah.
1 Maccabees 2:1-281 Maccabees 4:36-592 Maccabees 6:1-11
Demetrius
The kings after AlexanderWhen Alexander died his generals carved up the empire, and two of the resulting dynasties fought over Judea for a century and a half: the Ptolemies from Egypt and the Seleucids from Syria. Several kings and generals of both, named Demetrius, Ptolemy, Seleucus, Tryphon, Lysias, and Bacchides, move through the Maccabean books.
Daniel 11:5-201 Maccabees 7:1-251 Maccabees 10:1-21
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