Marquess of Hertford - Marquesses of Hertford, Second Creation (1793)

Marquesses of Hertford, Second Creation (1793)

• Francis Seymour-Conway, 1st Marquess of Hertford (1718–1794)
• Francis Ingram-Seymour-Conway, 2nd Marquess of Hertford (1743–1822)
• Francis Charles Seymour-Conway, 3rd Marquess of Hertford (1777–1842)
• Richard Seymour-Conway, 4th Marquess of Hertford (1800–1870)
• Francis Hugh George Seymour, 5th Marquess of Hertford (1812–1884)
• Hugh de Grey Seymour, 6th Marquess of Hertford (1843–1912)
• George Francis Alexander Seymour, 7th Marquess of Hertford (1871–1940)
• Hugh Edward Conway Seymour, 8th Marquess of Hertford (1930–1997)
• Henry Jocelyn Seymour, 9th Marquess of Hertford (b. 1958)

The heir apparent is the present holder's eldest son, William Francis Seymour, Earl of Yarmouth (b. 1993).