Figure Analysis
There's not too much to say about this bunch, except that there sort of mysterious. Isaiah's wife is described as "The Prophetess." So what exactly does that mean? Is she a prophet—like Deborah from Judges—too? Or is it just an honorary title for being married to a prophet? Who can say?
Isaiah's kids exist mainly to have prophetic names related to future events. Their characters really aren't described in much detail. "Maher-Shalal-Hash-Baz" (the second longest name in the Bible, though sometimes people claim it's the longest) means "Quick to the spoils," prophesying how the Assyrians will pillage the land. Isaiah's other son Shear Jashub's name means "a remnant shall return," predicting how some righteous members of Judah and Israel will survive the various invasions and persecutions they will undergo, to finally return to the Holy Land in triumph.