The heir apparent is the present holder's son Hon. George Rupert James Hennessy (b. 2006)[6]
Line of Succession
George Richard James Hennessy, 1st Baron Windlesham (1877—1953)
James Bryan George Hennessy, 2nd Baron Windlesham (1903—1962)
David James George Hennessy, 3rd Baron Windlesham, Baron Hennessy (1932—2010)
James Rupert Hennessy, 4th Baron Windlesham (born 1968)
(1)Hon. George Rupert James Hennessy (b. 2006)
Hon. Frederick Francis George Hennessy (1906—1969)
Peter Grant Auguste Hennessy (1944—2019)
(2) James George Hennessy (b. 1970)
(3) Benedict John Hennessy (b. 1978)
Arms
Coat of arms of Baron Windlesham
Crest
In front of a dexter arm embowed in armour the hand grasping a battle-axe a trefoil slipped and a red rose stalked and saltirewise all Proper.
Escutcheon
Gules a boar passant Proper on a chief Or a trefoil slipped Vert between two roses of the field barbed and seeded also Proper.
Supporters
On either side an officer of the Irish Brigade in the service of the King of France in the 18th century Proper the dexter supporting with the exterior hand a gold mounted and tasselled staff Proper.