This is in referrence to idols. In the OT times, there existed many false gods. These scriptures are clearly referrencing thos false gods and not His children.
I Corinthians 8:5; For even if there are so-called gods, whether in heaven or on earth [as indeed there are many gods and many lords] yet for us there is but ONE God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things come and through whom we live."
Well, I cannot imagine how the word of God came to idols.
Nor can I see why Jesus would defend himself against a charge of blasphemy by citing Psalm 82 if it refers to false gods or idols.
But don't take my word for it; read Psalm 82 yourself:
PSALM 821 God standeth in the congregation of the mighty; he judgeth among the gods.
2 How long will ye judge unjustly, and accept the persons of the wicked? Selah.
3 Defend the poor and fatherless: do justice to the afflicted and needy.
4 Deliver the poor and needy: rid them out of the hand of the wicked.
5 They know not, neither will they understand; they walk on in darkness: all the foundations of the earth are out of course.
6 I have said, Ye are gods; and all of you are children of the most High.
7 But ye shall die like men, and fall like one of the princes.
8 Arise, O God, judge the earth: for thou shalt inherit all nations.
Now, would idols be called "children of the most High?" Or can idols "die like men"? I don't think so, but you are free to disagree.