John Calvin Commentary Genesis 2:23

"And the man said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man." — Genesis 2:23 (ASV)

And Adam said, etc. The question is asked from where Adam derived this knowledge, since he was at that time deeply asleep. If we say that his quickness of perception was then such as to enable him to form a judgment by conjecture, the solution would be weak. But we should not doubt that God would make the whole course of the event clear to him, either by secret revelation or by His word. For it was not from any necessity on God’s part that He took the rib from man from which He might form the woman; but He designed that they should be more closely joined together by this bond, which could not have been achieved unless He had informed them of the fact.

Moses does not, indeed, explain by what means God gave them this information; yet, unless we would make the work of God unnecessary, we must conclude that its Author revealed both the fact itself and the method and purpose of its accomplishment. The deep sleep was sent upon Adam, not to hide from him the origin of his wife, but to spare him from pain and trouble, until he should receive such an excellent compensation for the loss of his rib.

This is now bone of, etc. In using the expression הפעם (hac vice), Adam indicates that something had been lacking for him; as if he had said, 'Now at last I have obtained a suitable companion, who is part of the substance of my flesh, and in whom I see, as it were, another self.' And he gives his wife a name taken from that of man, so that by this testimony and this mark he might transmit a perpetual memorial of the wisdom of God. A deficiency in the Latin language compelled the ancient interpreter to render אשה (ishah) with the word virago. It should be noted, however, that the Hebrew term means nothing other than 'the female of the man.'