Short answers, pulled from the story.
Isaiah began his ministry during the reign of King Uzziah in the 740s BC and his work spanned nearly two decades covering four different kings. His public service continued through the reigns of Jotham, Ahaz, and Hezekiah before possibly extending into the reign of Manasseh.
Isaiah had two sons named Shear-Jashub and Maher-Shalal-Hash-Baz whose names served as prophetic declarations of the nation's fate. Shear-Jashub translates to A remnant shall return while Maher-Shalal-Hash-Baz means Quickly to spoils plunder speedily.
In 701 BC an angel of God struck down 185,000 Assyrian soldiers in a single night while King Sennacherib threatened Jerusalem. This divine intervention caused Sennacherib to never recover from the shock and made no further expeditions against Judea or Egypt.
According to the Talmud King Manasseh ordered Isaiah to be sawn in two when a cedar tree opened to swallow him after he uttered the tetragrammaton. Islamic tradition recounts that the unrighteous of Judea sought to kill Isaiah and he was martyred in a similar manner.
Archaeologist Eilat Mazar announced the discovery of a small seal impression reading belonging to Isaiah nvy during the Ophel excavations in February 2018. The clay bulla was found 10 feet away from an intact bulla bearing the inscription belonging to King Hezekiah of Judah.
The Book of Mormon states that great are the words of Isaiah and quotes him more than any other prophet from the Old Testament. The Eastern Orthodox Church celebrates Saint Isaiah the Prophet with Saint Christopher on the 9th of May.