Everyone here has a write-up, drawn from the same records that explain the names while you read the text.
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
Moses
Prophet and lawgiverRaised in Pharaoh's household, exiled for forty years as a shepherd, then sent back to demand Israel's release. He led the nation out of Egypt, received the law at Sinai, and led them forty years through the wilderness, but died on Mount Nebo within sight of the land he never entered.
Exodus 2-40NumbersDeuteronomy 34
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
Caleb
Faithful spyThe other spy who urged Israel to go up at once. Forty-five years later, at eighty-five, he asked for the hill country with the fortified cities in it, on the grounds that he was as strong as the day Moses sent him out.
Numbers 13:30Deuteronomy 1:36Joshua 14:6-14
Balaam
Seer for hireA diviner from the Euphrates hired to curse Israel, who could only say what God gave him to say, including one of the clearest messianic lines in the Torah. The Bible's later verdict on him is harsh: Numbers, Peter, Jude, and Revelation all treat him as the pattern of a religious professional who sells his gift.
Numbers 22-24Numbers 31:16Deuteronomy 23:4-5
Sihon
Kings east of the JordanTwo Amorite kings, of Heshbon and of Bashan, who refused Israel passage and were defeated. Their names become a fixed pair in Israel's memory, recited in psalms and speeches for centuries as the standard example of what God did.
Numbers 21:21-35Deuteronomy 3:1-11Psalm 136:17-22
Machir
The clans of ManassehManasseh's son and the clan descended from him, who took Gilead east of the Jordan. In the Song of Deborah, Machir stands in for the whole tribe. A separate Machir of Lo-debar sheltered Mephibosheth and later supplied David during Absalom's revolt.
Genesis 50:23Numbers 32:39-41Deuteronomy 3:14