Who Lord Bullingdon is
Lord Bullingdon is the son of Lady Lyndon, the wealthy aristocratic woman whom Redmond Barry pursues. He resists Barry's authority and his treatment of the family, placing him in conflict with Barry.
Lord Bullingdon and the others in the story
Barry approaches Lady Lyndon with ambitions that make marriage a route to property and social standing. Lord Bullingdon's resistance stands against Barry's efforts to exercise authority within the family.
Barry tells his own story, presenting himself as honorable and blaming resistance on other people's faults. That self-justifying perspective matters when reading about a character who challenges his authority.
Questions
Who is Lord Bullingdon in Barry Lyndon?
Lord Bullingdon is Lady Lyndon's son and a character who opposes Redmond Barry's authority.
How is Lord Bullingdon related to Lady Lyndon?
He is her son, and his resistance to Barry concerns Barry's treatment of the family.
Why does Lord Bullingdon resist Barry?
He objects to Barry's authority and the way Barry treats the family. Barry's pursuit of wealth and standing provides the wider setting for their conflict.