Richard of Conisburgh, 3rd Earl of Cambridge (c. 1375 – 5 August 1415) was the younger son of Edmund of Langley, 1st Duke of York

Edmund of Langley, 1st Duke of York

Edmund of Langley, 1st Duke of York, 1st Earl of Cambridge, KG was a younger son of King Edward III of England and Philippa of Hainault, the fourth of the five sons who lived to adulthood, of this Royal couple. Like so many medieval princes, Edmund gained his identifying nickname from his...

 and Isabella of Castile

Isabella of Castile, Duchess of York

Infanta Isabella of Castile, Duchess of York was a daughter ofKing Peter of Castile and María de Padilla. She was a younger sister of Constance, Duchess of Lancaster....

.

His paternal grandparents were Edward III, King of England

Edward III of England

Edward III was King of England from 1327 until his death and is noted for his military success. Restoring royal authority after the disastrous reign of his father, Edward II, Edward III went on to transform the Kingdom of England into one of the most formidable military powers in Europe...

 and Philippa of Hainault

Philippa of Hainault

Philippa of Hainault, or, Philippe de Hainaut was the Queen consort of King Edward III of England. Edward, Duke of Guyenne, her future husband, promised in 1326 to marry her within the following two years...

. His maternal grandparents were Peter of Castile and María de Padilla

María de Padilla

María Díaz de Padilla was the mistress of King Peter of Castile whom he married in secret in 1353.She was a Castilian noblewoman...

. He was born at Conisburgh Castle

Conisbrough Castle

Conisbrough Castle is a 12th-century castle in Conisbrough, South Yorkshire, England, whose remains are dominated by the 97-foot high circular keep, which is supported by six buttresses. In the mid-1990s, the keep was restored, with a wooden roof and two floors being rebuilt...

 in Yorkshire

Yorkshire

Yorkshire is a historic county of northern England and the largest in the United Kingdom. Because of its great size in comparison to other English counties, functions have been increasingly undertaken over time by its subdivisions, which have also been subject to periodic reform...

, and was confirmed in the Earldom of Cambridge

Earl of Cambridge

The title of Earl of Cambridge was created several times in the Peerage of England, and since 1362 the title has been closely associated with the Royal Family ....

, which had been resigned by his brother, in 1414.

Later years and death

Following Anne's death, Cambridge married Matilda Clifford, daughter of Thomas de Clifford, 6th Baron de Clifford

Thomas de Clifford, 6th Baron de Clifford

Sir Thomas de Clifford, 6th Baron de Clifford, also 6th Lord of Skipton was a Knight of The Chamber, hereditary Sheriff of Westmorland, Governor of Carlisle Castle, and Warden of the East Marches....

 (1363–1391), but they were probably married a very short time before he was discovered to be one of the fomentors of the Southampton Plot

Southampton Plot

The Southampton Plot of 1415 was a conspiracy against King Henry V of England, aimed at replacing him with Edmund Mortimer, 5th Earl of March. The three alleged ringleaders were Richard of Conisburgh, 3rd Earl of Cambridge, Mortimer's brother-in-law; Henry Scrope, 3rd Baron Scrope of Masham The...

 against King Henry V

Henry V of England

Henry V was King of England from 1413 until his death at the age of 35 in 1422. He was the second monarch belonging to the House of Lancaster....

 immediately prior to departure on the French campaign. (His elder brother, Edward of Norwich, 2nd Duke of York

Edward of Norwich, 2nd Duke of York

Sir Edward of Norwich, 2nd Duke of York, 2nd Earl of Cambridge, Earl of Rutland, Earl of Cork, Duke of Aumale KG was a member of the English royal family who died at the Battle of Agincourt....

, would die at the Battle of Agincourt

Battle of Agincourt

The Battle of Agincourt was a major English victory against a numerically superior French army in the Hundred Years' War. The battle occurred on Friday, 25 October 1415 , near modern-day Azincourt, in northern France...

, less than three months later.) He was stripped of all his titles and estates and was beheaded on 5 August 1415 at Southampton

Southampton

Southampton is the largest city in the county of Hampshire on the south coast of England, and is situated south-west of London and north-west of Portsmouth. Southampton is a major port and the closest city to the New Forest...

 Green, Hampshire along with fellow conspirator Henry Scrope, 3rd Baron Scrope of Masham

Henry Scrope, 3rd Baron Scrope of Masham

Henry Scrope, 3rd Baron Scrope of Masham KG was a favourite of King Henry V of England but he was executed for his involvedment in the Southampton Plot.-Biography:...

; the fleet set sail for France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 a few days later on 11 August 1415. In King Edward IV's first parliament in November 1461, the condemnation of Richard, Earl of Cambridge in 1415 was annulled as irregular and unlawful.

Arms

Richard bore his father's arms (those of the kingdom, differenced by a label argent of three points, each bearing three torteaux gules), differenced by a bordure Leon.

Ancestry