Overflowing Grace
Isaiah was born sometime around 760 BC. We know little about Isaiah’s personal life. He was married and had two sons. His name in Hebrew is Yeshayahu which means “the Lord is the one who saves.” His name shares the same root as Yeshua (Jesus).
He was called to the prophetic office in his early years, toward the close of the reign of King Uzziah (Azariah, 790–739 BC). His ministry lasted about 50 to 60 years (Is. 1:1).
Isaiah served the nation during the rule of five (5) kings of Judah: Uzziah (who may have been Hezekiah's great grandfather), Jotham, Ahaz, Hezekiah, and Manasseh (Is. 1:1). According to chronology Uzziah died about the year 739 and Hezekiah died in 686, succeeded by his son Manasseh.
We don't know much about Isaiah. Most of what we know if found in his book.
Isaiah may have been a priest. In chapter 6, he has a vision while he is in the Temple of God. The angel takes a coal from the altar and touches his lips to purify him. Everything in this vision points to the Holy Place, where the altar of incense is located. So, it appears that Isaiah was physically present in the Holy Place, which means that he was a priest, serving in the Temple, [This is conjecture. There is no direct confirmation in the Bible that Isaiah was a priest.]
Isaiah may also have been from the royal line of King David. Isaiah was the son of Amoz.
"One plausible theory about Amoz's significance stems from Jewish tradition, arguing that Amoz was a brother of Amaziah, the king of Judah. If this connection holds, we could surmise that Amoz and therefore his son Isaiah, both belonged to a royal lineage. This could partially explain why Isaiah was so influential during his time, as his prediction and counsel to kings of Judah were always received with due respect." https://digitalbible.ca/article-page/bible-study-biblical-characters-who-is-amoz-1699570171594x523940044264347140
Although it is difficult to reconcile these two possibilities, it is an interesting idea. How could Isaiah be both from the line of Levi and the line of David? If this were true, however, it would add an interesting dimension to Isaiah and his prophecies. He would be like Jesus in the sense that he too was both a priest and of the line of David.
2 Kings 19 - The Assyrians came to Judah. They'd already conquered Israel (the northern kingdom) and were laying siege to Jerusalem. Hezekiah prayed to God and he answered, sending His angel to kill 185,000 of the Assyrian soldiers. After that, the Assyrians left and returned to their home. This account is also found in the book of Isaiah, 37th chapter and in 2Ch 32:20–23 ).
2 Kings 20 - Hezekiah became mortally ill. Isaiah tells him to put his house in order; He is going to die. But Hezekiah prays and God adds 15 years to his life and promises to protect Judah from the Assyrians. This account is also found in the book of Isaiah in chapter 38 and in 2Ch 32:24–26. The king asks Isaiah to give him a sign that he will be healed. Isaiah called on the Lord and He made the shadow on the sundial to go back 10 steps ( Isa 38:8).
Isaiah was a prophet to Judah and Jerusalem. He prophesied against a number of other nations, but it was generally related to their demise as related to Judah.
(Isa 34:5-6" For My sword is satiated in heaven, Behold it shall descend for judgment upon Edom And upon the people whom I have devoted to destruction. 6 The sword of the LORD is filled with blood, It is sated with fat, with the blood of lambs and goats, With the fat of the kidneys of rams. For the LORD has a sacrifice in Bozrah And a great slaughter in the land of Edom. "