Final answer:
After Joseph is sold, his brother Judah is the one who marries a Canaanite woman, as documented in Genesis 38. However, there is debate about the historical accuracy of these events due to a lack of archaeological evidence.
Step-by-step explanation:
The question pertains to a biblical event in which after Joseph is sold, one of his brothers marries a Canaanite woman. The specific brother who goes off to marry a Canaanite woman after Joseph is sold is Judah. This incident is documented in Genesis 38 where it is mentioned that Judah left his brothers and turned in to a certain Adullamite, whose name was Hirah. There Judah saw the daughter of a certain Canaanite, whose name was Shua, and he took her and went in to her. So this brother is notable for having moved away from his family and engaging with the local Canaanite population.
The biblical account provides a backdrop for the complex history and relationships among the descendants of Abraham and their neighbors.