🔼The name Shear-jashub in the Bible
The delightful name Shear-jashub occurs only once in the Bible, although as phrase שאר ישוב is used twice in Isaiah 10:21-22.
As name, this phrase belongs to a son of the prophet Isaiah, whose younger son he would call Maher-shalal-hash-baz. But Shear-jashub takes part in the prelude to one of the most quoted Old Testament statements.
YHWH calls Isaiah and instructs him to take his son Shear-jashub and go meet king Ahaz of Judah, on the road somewhere, while the latter is engaged in a war against king Rezin of Aram and king Pekah of Israel. Through Isaiah (and perhaps his son) the Lord tells king Ahaz not to fear because the plans of his foes will be thwarted.
In addition, the Lord allows Ahaz to ask for a sign, but Ahaz declines out of misplaced piety. And so the Lord decides to give a sign anyway and proclaims: Behold, a virgin shall be with child and bear a son, and she will call His name Immanuel (Isaiah 7:14).
🔼Etymology of the name Shear-jashub
The name Shear-jashub obviously consists of two elements. The first part comes from either of the two verbs שאר (sha'ar):
The second part of our name is an active form of the verb שוב (shub), meaning to return:
In a rare display of unison, for a meaning of the name Shear-jashub, NOBSE Study Bible Name List, Jones' Dictionary of Old Testament Proper Names, and BDB Theological Dictionary all three read A Remnant Shall Return.