The Lancastrian Line refers to the succession of English monarchs who were descendants of John of Gaunt, the Duke of Lancaster. Some synonyms for the Lancastrian Line include the House of Lancaster, the Lancastrian Dynasty, and the House of Plantagenet. Other synonyms may include the Red Rose Dynasty, which refers to the emblem of the House of Lancaster, and the Lancashire Line, which refers to the English county where John of Gaunt held his estates. The Lancastrian Line played a significant role in English history, with several of its monarchs including Henry IV, Henry V, and Henry VI, reigning during the tumultuous period of the Wars of the Roses.