Ham is the son of Noah traditionally associated with the ancestor of Canaan.
Genesis names Noah’s three sons as Shem, Ham, and Japheth. Genesis 10 identifies Canaan as a son of Ham, making Ham the direct ancestor named in the biblical genealogy. The same chapter presents genealogical lines connected with the peoples and nations known to the story’s ancient audience.
This question concerns the genealogy, not the order in which Noah’s sons entered the Ark. All three sons are described as surviving the Flood with Noah and their wives. Another common mix-up involves confusing Canaan with Ham himself: Canaan is Ham’s son in Genesis, while Ham is Noah’s son.
Later interpretations of the “curse of Ham” have been used to support racist theories, but those theories do not establish a racial hierarchy and are historically discredited. The straightforward genealogical answer in Genesis is Ham.