Concise Bible Dictionary:

1. A man of Mount Ephraim, whose history reveals the sad state of private life in Israel, as well as the mixture of idolatry with the name of Jehovah, early in the times of the Judges, Phinehas being still high priest. He had a house of gods, and made an ephod and teraphim, and consecrated one of his sons to act as priest. A wandering son of Levi finding his way to Micah’s house was gladly received by him, treated as one of his sons, and became his priest. Then Micah said, “Now know I that the Lord will do me good, seeing I have a Levite to my priest.” The Danites however, seeking a larger inheritance, sent spies to the north, who came near Micah’s house, and knowing the voice of the Levite, asked him to inquire of God for them. He ventured to reply, “Go in peace: before the Lord is your way wherein ye go.” A larger body of Danites afterward came and carried away the gods of Micah, and the ephod and the teraphim, together with the Levite, and took them to the north, where they established themselves. Micah hastened after them, but could not recover his gods. There was no king in Israel, and every man did that which was right in his own eyes; and God, though nominally owned, was, alas, in reality ignored( Judg. 17-18).

Jackson’s Dictionary of Scripture Proper Names:

who is like Jehovah?