Albert Barnes Commentary 2 Kings 17:13

"Yet Jehovah testified unto Israel, and unto Judah, by every prophet, and every seer, saying, Turn ye from your evil ways, and keep my commandments and my statutes, according to all the law which I commanded your fathers, and which I sent to you by my servants the prophets." — 2 Kings 17:13 (ASV)

God raised up a succession of prophets and seers, who repeated and enforced the warnings of the Law, and breathed new life into the old words. Among this succession were, in Israel, Ahijah the Shilonite (1 Kings 14:2), Jehu the son of Hanani (1 Kings 16:1), Elijah, Micaiah the son of Imlah (1 Kings 22:8), Elisha, Jonah the son of Amittai (2 Kings 14:25), Oded (2 Chronicles 28:9), Amos, and Hosea. In Judah, up to this time, there were Shemaiah (2 Chronicles 11:2; 2 Chronicles 12:5), Iddo (2 Chronicles 12:15; 2 Chronicles 13:22), Azariah the son of Oded (2 Chronicles 15:1), Hanani (2 Chronicles 16:7), Jehu his son (2 Chronicles 19:2), Jahaziel the son of Zechariah (2 Chronicles 20:14), Eliezer the son of Dodavah (2 Chronicles 20:37), Zechariah the son of Jehoiada (2 Chronicles 24:20), another Zechariah (2 Chronicles 26:5), Joel, Micah, and Isaiah, besides several whose names are not known. Some of these individuals are called “prophets,” others “seers.” Occasionally, the same person has both titles (as Iddo and Jehu the son of Hanani), which seems to show that there was no very important distinction between them.

The conjecture is likely correct that “prophet” (נביא nâbı̂y'), strictly speaking, designates only the official members of the prophetic order, while “seer” (חזה chôzeh) is applicable to all who receive a prophetic revelation, whether they are members of the order or not.