Isaiah ( /aɪˈzeɪ.ə/ or UK /aɪˈzaɪ.ə/;Hebrew: יְשַׁעְיָהוּ, Modern Yeshayahu Tiberian Yəšạʻyā́hû ; Greek: Ἠσαΐας, Ēsaïās ; "Yahu is salvation") was a prophet who lived in the 8th-century BC Kingdom of Judah.Jews and Christians consider the Book of Isaiah a part of their Biblical canon; he is the first listed (although not the earliest) of the neviim akharonim, the latter prophets.

Isaiah is not mentioned anywhere outside of the Bible. It is stated in the first verse of the Book of Isaiah that he prophesied during the reigns of Uzziah (or Azariah), Jotham, Ahaz, and Hezekiah, the kings of Judah (Isaiah 1:1). Uzziah reigned fifty-two years in the middle of the 8th century BC, and Isaiah must have begun his career a few years before Uzziah's death, probably in the 740s BC. Isaiah lived until the fourteenth year of Hezekiah (who died 698 BC), and may have been contemporary for some years with Manasseh. Thus Isaiah may have prophesied for as long as sixty-four years.

Isaiah's wife was called "the prophetess" (Isaiah 8:3), either because she was endowed with the prophetic gift, like Deborah (Judges 4:4) and Huldah (2 Kings 22:14-20), or simply because she was the wife of "the prophet" (Isaiah 38:1). The second interpretation, that it was simply an honorary title, "Mrs. Prophet" as it were, is likely. They had two sons, naming one Shear-Jashub, meaning "A remnant shall return"Isaiah 7:3 and the younger, Maher-Shalal-Hash-Baz, meaning, "Spoil quickly, plunder speedily."Isaiah 8:3

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