Maher-shalal-hash-baz
Maher-shalal-hash-baz was the second mentioned prophetic-name child in Isaiah chapter 8–9.The name is mentioned twice in the Hebrew Bible and both in the Book of Isaiah chapter 8:
Isaiah 8:1
Isaiah 8:3Analysis
The child Maher-shalal-hash-baz is the second prophetic-name child after the birth of Immanuel – traditionally understood as the son of Abi the bride of king Ahaz, i.e., the future king Hezekiah, by many Jewish commentators, or of another woman. The phrases maher-shalal and hash-baz are synonymous, both meaning approximately "quickly to the plunder". The name Maher-shalal-hash-baz is a reference to the impending plunder of Samaria and Damascus by the king of Assyria, Tiglath-Pileser III.
This is often counted the longest name used in the Bible, though a possible longer name-phrase in Isaiah is found in "called Pele-joez-el-gibbor-abi-ad-sar-shalom"
The section is also quoted in the Book of Mormon.