Final answer:
The Lax family of Halifax County, Virginia, is an example of a prominent Northerner who had four brothers fighting for the Confederacy.
Step-by-step explanation:
John served in the Confederate army throughout the war, while William A. contracted dysentery and later died while being held in a Union prisoner of war camp.
This example showcases the complex and divided loyalties that existed during the American Civil War. Despite their Northern background, the Lax family had members who actively fought for the Confederate cause. It demonstrates that individuals and families could have differing allegiances and make choices based on personal convictions, regardless of their geographic origin.