André de Cortanze
André de Cortanze is a French motorsport engineer.
Guy XIV de Laval
Guy XIV de Laval, François de Montfort- Laval,( 28 January 1406 – 2 September 1486, Châteaubriant), comte de Laval, baron de Vitré and of La Roche- Bernard, seigneur of Gâvre, of Acquigny, of Tinténiac, of Montfort and Gaël, of Bécherel, was a French nobleman, known for his account of Joan of Arc.
He and his brother André de Lohéac were simultaneously vassals of the duke of Brittany and of the king of France.
Sylvestre de Laval
Sylvestre de Laval( 15701616) was a French Roman Catholic theologian.
Guy XIII de Laval
Guy XIII de Laval, born Jean de Montfort, (1385- 14 August 1414, Rhodes) was seigneur of Laval and of Kergorlay.
His father was Raoul IX de Montfort and his mother Jeanne de Kergorlay.
He inherited the Laval title through his marriage on 22 January 1404 to Anne de Laval.
As daughter and sole heir to Guy XII de Laval, Anne was "dame de Laval", and one of the conditions of the marriage was that any children born to it would bear the name and arms of the House of Laval.
(The same condition had already been applied to the marriage of Emma de Laval with Mathieu II de Montmorency.)
Nevertheless, Jean de Montfort renounced the name and title he had been born with to take up the name of Guy XIII de Laval, better to associate himself with his wife Anne's power.
From the couple were descended several bishops and the greatest seigneurs of Brittany.
Guy and Anne had 5 children:
Guy XIII died of plague on his return from a pilgrimage to the Holy Land.
Antoine Gaston de Roquelaure
Antoine Gaston de Roquelaure( 1656- 6 May 1738) was a French nobleman and Marshal of France.
He was also grandson to another Marshal, Antoine de Roquelaure.
He was the son of Gaston Jean Baptiste de Roquelaure( 1615- 1683), Duke of Roquelaure and his wife Charlotte du Lude( died 1657).
On 19 May 1683 he married Marie- Louise de Laval- Lezay, daughter of Guy- Urbain de Laval- Montmorency( 1657- 1735), with whom he had two daughters:
According to Saint- Simon, he was" pleasant company"
André de Laval-Montmorency
André de Laval-Montmorency, seigneur de Lohéac (1485) was a Marshal of France.
He was the son of Guy XIII de Laval and Anne de Laval, and a leading member of the House of Laval.
In 1423 he served in the French army against England, wielding the sword of Bertrand du Guesclin, a symbol of Breton support for France.
He had inherited the sword from his maternal grandmother, Jeanne de Laval, who was the widow of the famous constable.
In 1428 André was taken prisoner by John Talbot, 1st Earl of Shrewsbury, after the capitulation of Laval, which he was defending.
After paying his ransom he was present with Joan of Arc at the siege of Orléans, at the Battle of Patay, and at the coronation of Charles VII.
He was made admiral of France in 1437 and marshal in 1439.
He served Charles VII faithfully in all his wars, even against the "dauphin" (1456), and when the latter became king as Louis XI, Laval was dismissed from the marshal's office.
After the War of the Public Weal he was restored to favor, and recovered the marshal's baton, the king also granting him the offices of lieutenant-general to the government of Paris and governor of Picardy, and conferring upon him the collar of the Order of St Michael.
In 1472 Laval was successful in resisting the attacks of Charles the Bold, duke of Burgundy, on Beauvais.
André married Marie de Rais, also of the House of Laval, and daughter of Gilles de Rais.
Anne-Adrien-Pierre de Montmorency-Laval
Anne- Adrien- Pierre de Montmorency," duc de Laval"( 29 October 1768, Paris – 16 June 1837, Paris), was 3rd Duc de Laval and a peer of France.
He was an heir of the noble families of Montmorency and of, styled" Marquis de Laval" then" Prince de Montmorency- Laval" before succeeding to his father's titles in 1817.
He was additionally created a grandee of Spain and.
Adrien de Montmorency- Laval was a French army officer, before serving as French foreign minister and as an ambassador during the Bourbon Restoration.
Guy V de Laval
Guy V de Laval( died 1210) was the Lord of Laval, Mayenne.
Guy IX de Laval
Guy IX de Laval( c. 1270 – 22 January 1333) was a member of the House of Laval.
He was Seigneur de Laval and d'Acquigny, Viscomte de Rennes, Comte de Caserte in Campania and Baron de Vitré.
Anne de Laval (1385–1466)
Anne de Laval( 1385 – 25 January 1466) was a medieval French noblewoman.
She was the daughter of Jeanne de Laval- Tinténiac and her second husband( died 1412), governor of Brittany and baron of Laval( Jeanne's first husband had been Bertrand du Guesclin).

Question: What is the cause of death of André De Laval-Montmorency's father?
Answer: plague