Shear-Jashub in the Bible Encyclopedia - ISBE

she-ar-ja'-shub or jash'-ub (she'ar yashubh, "a remnant shall return"; Septuagint ho kataleiphtheis Iasoub): The son of Isaiah, who accompanied him when he set out to meet Ahaz (Isa 7:3). The name like that of other children of prophets (compare "Immanuel," "Mahershalal-hash-baz," "Lo-ruhamah," etc.) is symbolic of a message which the prophet wishes to emphasize. Thus Isaiah uses the very words she'ar yashubh to express his oft-repeated statement that a remnant of Israel will return to Yahweh (Isa 10:21).