The prophet Isaiah was alive in his late sixties. According to one non-Biblical story, he was martyred after being accused by a false prophet acting on behalf of a demon.
There is a tradition that states that Isaiah was executed by the wicked King Manasseh by sawing him in half. If Hebrews 11:37 is not a reference to Isaiah then it is not mentioned. In any case the Bible itself does not, without recourse to tradition, mention it.
Isaiah 1:1 says that Isaiah wrote during the reigns of Uzziah, Jotham, Ahaz and Hezekiah, who is believed to have reigned circa 729-686 BCE. Isaiah's death could not have been before 729, but could have been before or shortly after 686 BCE.
The above date is for the author known today as First Isaiah, since two anonymous authors, now known as Second Isaiah and Third Isaiah, completed the Book of Isaiah during and then shortly after the Babylonian Exile, more than a hundred years later.
Isaiah, the prophet who wrote the first part of the Book of Isaiah, says that he wrote about event that he saw during the days of Hezekiah, king of Judah. Hezekiah reigned from 729 to 686 BCE, so Isaiah probably died before 686 BCE.
According to traditional chronology, Isaiah died in or around 530 BCE. See also:
Note:
Tradition states that there was only one Isaiah. Theories claiming more than one are unproven.
See:
One Isaiah (a Christian post)
Debunking the JEPD Documentary Hypothesis
The story is that he hid in a hollow tree to escape the reign of Manasseh, and the king's soldiers, knowing he was in that tree, sawed the tree down. Thus, he was sawn in half.
King Manasseh who was a cruel man had him sawed to death. That is Jewish history.
The bible does not mention it at all in the bible. But the Jewish tradition believe that Isaiah was sawed in half with a wooden saw by the evil king Manasseh.
Isaiah Horowitz died in 1630.
Isaiah Kantor died in 2006.
Isaiah Blood died in 1870.
Isaiah Dorman died in 1876.
Isaiah Stillman died in 1861.
Isaiah Smithurst died in 1982.
Isaiah Kopinsky died in 1640.
Isaiah Sellers died in 1864.
Isaiah of Rostov died in 1090.
Isaiah Hart died in 1861.
Isaiah Turner died in 1936.
Isaiah Thomas died in 1831.