Divided Monarchy · Prophet
The book of Nahum names him as the Elkoshite and presents his oracle as a vision concerning Nineveh Nahum 1:1.
Nahum announces Yahweh as slow to anger yet great in power, and the prophecy declares judgment against the bloody city Nahum 1:2-8 Nahum 3:1-7.
Nahum is not in the line to Jesus.