John Calvin Commentary Isaiah 36:3

"Then came forth unto him Eliakim the son of Hilkiah, who was over the household, and Shebna the scribe, and Joah, the son of Asaph, the recorder." — Isaiah 36:3 (ASV)

And Eliakim went to him. Eliakim was previously mentioned. It was he to whom the Lord promised that he would give him the chief power in the kingdom after the banishment of Shebna (Isaiah 22:20). It now appears as if that promise had failed, when he is sent to an enemy as a suppliant, and as one who is about to surrender himself and his companions, and to undergo cruel tyranny. This might also fill the hearts of believers with anxiety, and lead them to doubt the promises of God. Besides, the godly king had such a scarcity of good men, that, along with Eliakim, he was compelled to send Shebna, whom he knew well to be deceitful and treacherous.

ספר (sopher) means scribe; and accordingly, it often denotes learned men or doctors, and sometimes those who took charge of writings and those who had the custody of the royal records. I have translated it chancellor, for unquestionably it does not relate to legal skill; and we may infer that this Shebna held a high rank, though he had been deprived of his office as governor. מזכיר (mazkir) denotes a secretary or recorder.