Sir Andrew, the Baron of Earlshall, who lived in the castle in the 17th century, was known as "Bloody Bruce" for his "brutal" victory at the Battle of Killiecrankie in 1689 during the Scottish Jacobite uprising, according to the Savills website.
Andrew's footsteps are said to be heard on the spiral staircase to this day, the website adds.
A spokesperson for Savills told Insider that the agency declines to comment on the "haunted" history of the property, due to it being "unhelpful" with sales.