Marquess of the Southern Isles

Marquess of the Southern Isles (also Marquis of the Southern Isles) is an extinct title in the Peerage of Pyrus.
== Ancienty and Precedence ==
The title was created in 1772 for Celasin Derfel.
== Descent ==
The title was held by the House of Derfel. However the title was forfeited under the Great Land Reform Act: 1772. The title has been extinct since 1773.
== Marquesses of the Southern Isles ==
Celasin Derfel, 1st Marquis of the Southern Isles (b.1754) (forfeit 1773)
Category:Peerage of Pyrus
Category:House of Derfel