Maher-shalal-hash-baz (/ˈmɑːhɛrʃælælˈhæʃbɑːz/;Hebrew: מַהֵר שָׁלָל חָשׁ בַּז- "Hurry to the spoils!" or "He has made haste to the plunder!" - was the second mentioned prophetic child in Isaiah ch.7-9.
"And I draw near unto the prophetess, and she conceiveth, and beareth a son; and Jehovah saith unto me, 'Call his name Maher-shalal-hash-baz, ..." Isaiah 8:3
The prophetIsaiah's first son Shear-jashub is mentioned only once in Isaiah 7:3. Commentators, Jewish and Christian, traditionally note that this first son's name is also prophetic - meaning "the remnant shall return" - but no account of why, when or how this son was named is given in the Book of Isaiah.
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 name Maher-shalal-hash-baz is a reference to the impending plunder of Samaria and Damascus by the king of Assyria, Tiglath Pileser III (734-732 BCE).
^Joseph Herman HertzThe Pentateuch and Haftorahs 1968 "This clearly indicates that the 'crown prince' is the person referred to. pele-joez-el-gibbor-abi-ad-sar-shalom. i.e. Wonderful in counsel is God the mighty, the Everlasting Father, the Ruler of Peace (Rashi and Luzzatto)."
^James R. Beck Jesus & personality theory: exploring the five-factor model p11 1999 "When translators come to Isaiah 9:6, they could also leave the name of the promised Messiah in its transliterated state, in which case the name would be even longer than that of Isaiah 8:1: Pele-joez-el-gibbor-Abi-ad-sar-shalom."