Biblical judges
A biblical judge (Hebrew: shofet שופט, pl. shoftim שופטים) was "a ruler or a military leader, as well as someone who presided over legal hearings."
Following the conquest of Canaan by Joshua until the formation of the first Kingdom of Israel (ca. 1150–1025 BC), the Israelite tribes formed a loose confederation. No central government existed in this confederation; in times of crisis, the people were led by ad hoc chieftains known as judges.
Judges mentioned in the Bible
Moses was a judge over the Israelites and appointed others to whom cases were delegated in accordance with the advice of Jethro, his Midianite father-in-law. The Book of Judges mentions twelve judges: Othniel, Ehud, Shamgar, Deborah, Gideon, Tola, Jair, Jephthah, Ibzan, Elon, Abdon, and Samson. The First Book of Samuel mentions Eli and Samuel, as well as Joel and Abiah (two sons of Samuel). The First Book of Chronicles mentions Kenaniah and his sons. The Second Book of Chronicles mentions Amariah and Zebadiah (son of Ishmael).