Isaiah was married and had at least two sons (see Isaiah 7:3; 8:1–3). In Isaiah 8:3 he refers to his wife as “the prophetess.” The expression “prophetess” is used here only to designate the prophet’s wife, not a prophetic office or gift (see Young, Book of Isaiah, 1:303).
Isaiah; name means “the Lord is salvation” and this idea is reflected in his writings. His sons were both given prophetic names to dramatize Isaiah’s message. His first son, Shear-jashub (Isaiah 7:3), name means “the remnant shall return” (Isaiah 7:3a) and the second, Maher-shalal-hash-baz, name means “to speed to the spoil, he hasteneth the prey.” (Isaiah 8:1). All three names convey a message to the people in Judah so that whenever anyone saw or heard Isaiah and his sons, they were given a message through those names, as a sign or witness against the people.
Shear-jashub accompanied his father in visiting the king.