The five main ranks in the British peerage, from highest to lowest (per Debrett's and historical precedent):
Duke — Highest rank, often royal or historic (e.g., Duke of Westminster).
Marquess — Second, territorial title.
Earl — Equivalent to continental "count".
Viscount — Mid-tier, often a step below earl.
Baron — Lowest peerage rank.
Beyond the five main British ranks, continental Europe employs several additional titles, some of which denote higher or more specific sovereign statuses.
While the British peerage typically begins at Duke, continental systems often include titles that rank between a King and a Duke:
Archduke / Archduchess: Historically unique to the House of Habsburg in Austria; ranked above a Grand Duke.
Grand Duke / Grand Duchess: A title for rulers of a grand duchy (e.g., modern-day Luxembourg); ranked below an Archduke but above a Prince.
Prince / Princess: In many European countries (like Monaco or Liechtenstein), this is a sovereign title for the head of state, whereas in Britain, "Prince" is generally a title for the children of a monarch rather than a peerage rank.
Different European regions developed unique titles based on their specific feudal histories:
Count (Comte/Graf): The direct continental equivalent of the British Earl. While Britain uses "Earl" for the male title, the female equivalent remains "Countess" across all systems.
Margrave (Markgraf): A title prevalent in the Holy Roman Empire for a military governor of a border province (a "march"). It is the continental equivalent of a Marquess.
Landgrave (Landgraf): A German title for a count who held direct feudal duty to the Emperor, ranking roughly with a Duke.
Freiherr: The German equivalent of a Baron.
Vidame: A rare French title for a secular official who represented a bishop in feudal matters.
Below the primary peerage ranks, other titles exist that denote nobility or gentry:
Baronet: A hereditary title unique to Britain, ranking below Baron but above Knight.
Knight / Chevalier / Ritter: The lowest rank of the nobility in many systems, often awarded for service rather than land ownership.
Esquire / Écuyer: Originally a title for a knight's attendant; later became a title for untitled gentlemen