In Genesis, what did Noah name the son born after the Flood?
Answer
Noah had no such son
In Genesis, Noah is not described as having a son born after the Flood.
Genesis names Noah’s three sons—Shem, Ham, and Japheth—before the Flood narrative. They enter the Ark with Noah and their wives, and Genesis does not introduce a later-born son of Noah after the waters recede.
This question addresses a common confusion between Noah and other patriarchal genealogies. Genesis 9 discusses Noah’s life after the Flood, including his vineyard and the episode involving Ham, but it does not record another child born to Noah. The text also does not name Noah’s wife.
Later religious traditions, popular retellings, and fictional adaptations sometimes expand the family story or assign names to unnamed characters. Those additions should not be mistaken for a post-Flood son named in Genesis. The canonical answer is therefore that Genesis records no such son, rather than a personal name.