Jorge Luis Borges, an author from Argentina, has a story in his collection entitled “Labyrinths” (New Directions Publishing, 1962), about a man who dreamed so intensely about a boy that the boy became a real person; and later the dreamer found that he himself had earlier been dreamed into existence by a third man. The story is called “The Circular Ruins”, and shows that there could be whole generations of dream-engendered human beings. (However, I tend to think that this is males’ substitute for women giving birth to actual flesh-and-blood people.)
Borges has another story in the same collection called “Tlon, Uqbar, Orbis Tertius”, which describes a whole planet in which everyone believes in philosophical idealism, i.e. that thought (including dreams) is the only reality, and that matter and all objects are creations of mind. In such a world, I presume, dreaming persons into existence would be quite common, although Borges does not connect the two stories.
Australian aborigines had their own ancient “dreamtime” when the world was created, and they talk about “singing the world into existence” by their magic chants. The book “A Crack in the Cosmic Egg” talks about the dreamer REALLY flying like a bird, the bird being observable by others. The young bride in “Soul of Willow” placed her soul in a tree during the night, and actually died when the tree was cut down. A Maya saying is “In the beginning, a dream was dreaming us.” And there are many stories of two people agreeing to meet in each other’s dreams in a specific time at a stated time, and actually doing so.
For the aborigines, the dreamtime coincides with present time, since time is just as unreal as matter. The Hopi in southeastern USA have no word in their language for past, present, or future. The past as recorded is “manifest”, but the present and future are still “manifesting”. It is a whole different world of thinking, in which “words make the world”.
And in theology, did not “THE WORD (LOGOS)” create the world? We human beings have REALLY been created through thoughts and dreams and words, since we ARE thoughts in God’s mind. And since we were created in His image, why should we not be able to dream other humans into existence? This would create the “generations” of vertical dream descent. . .