The book names Zephaniah
Unlike some biblical books whose writers are not named, Zephaniah begins by telling readers who brought this message. It presents the prophecy as the word of the Lord that came to Zephaniah, during the reign of King Josiah in Judah (Zephaniah 1:1). So the straightforward biblical answer is that the prophet Zephaniah wrote, or delivered and preserved, the book that bears his name.
The opening also gives Zephaniah an unusually long family line: he was the son of Cushi, son of Gedaliah, son of Amariah, son of Hezekiah (Zephaniah 1:1). Many readers think this Hezekiah may have been King Hezekiah, though the verse does not explicitly call him king. Either way, the genealogy roots Zephaniah in a real Judean family and setting.
The word of the Lord which came unto Zephaniah the son of Cushi, the son of Gedaliah, the son of Amariah, the son of Hizkiah, in the days of Josiah the son of Amon, king of Judah.
A prophet in Josiah’s Judah
Zephaniah ministered while Josiah was king of Judah. Josiah is remembered for seeking the Lord and removing many forms of idolatry from the land (2 Kings 22:1-2). Yet Zephaniah’s message shows that serious unfaithfulness still remained, especially in Jerusalem.
He spoke directly against worship that mixed devotion to the Lord with the worship of Baal and other gods (Zephaniah 1:4-5). He also challenged violence, dishonesty, spiritual complacency, and leaders who abused their position (Zephaniah 1:9, Zephaniah 3:3-4). His words were not abstract predictions. They addressed the life of his own city.
What Zephaniah wrote about
The book centres on what Zephaniah calls the day of the Lord, a time when God would confront evil and hold people accountable (Zephaniah 1:14-15). That is sobering, but it is not the whole message. God’s judgement is never pictured as careless or cruel. He sees wrongdoing clearly and calls people to seek him with humility (Zephaniah 2:3).
Hope rises strongly near the end. Zephaniah looks beyond judgement to a restored people who trust the Lord, and he describes God rejoicing over them with love (Zephaniah 3:12, Zephaniah 3:17). This makes the book both honest about sin and rich with hope.
The Lord thy God in the midst of thee is mighty; he will save, he will rejoice over thee with joy; he will rest in his love, he will joy over thee with singing.
Why knowing the author helps
Knowing that Zephaniah was a prophet in Judah helps us read his strong language in context. He was not simply predicting distant events. He was calling his neighbours to turn from compromise and to seek the Lord while there was time.
Zephaniah’s name is often understood to mean “the Lord has hidden” or “the Lord protects”. The book itself does not explain the meaning, so that detail should not carry more weight than the message does. Start with Zephaniah 1:1, then read through the short book slowly. Notice both the warning and the promise of God’s presence with his people.