Duke of Aveiro

The Dukedom of Aveiro (Portuguese: Duque de Aveiro) was an aristocratic Portuguese title, granted in 1535 by King John III of Portugal to his 4th cousin, John of Lencastre, son of Infante George of Lencastre, a natural son of King John II of Portugal.

Arms of the Lencastres, Dukes of Aveiro.

John of Lencastre was already Marquis of Torres Novas when the King granted him the new title of Duke of Aveiro. Later, their descendants strongly supported Philip II of Spain during the 1580 Portuguese succession crisis. Thus the Dukes became the second aristocratic House of Portugal, after the Braganzas.

Raimundo of Lencastre, 4th Duke of Aveiro maintained his House's traditional support for the Habsburg monarchy, even after the 1640 national revolution in Portugal. Therefore the Aveiro property was confiscated by the new Kings of the Braganza Dynasty, and granted in 1668 to his uncle, Peter of Lencastre, who already was Archbishop of Évora and general Inquisitor, becoming 5th Duke of Aveiro. He died in 1673 without issue.

The succession was given to his niece, Maria de Guadalupe of Lencastre, who was married to the Spanish Duke of Los Arcos. She returned to Portugal with her younger son, while her husband and her older son stayed in Spain. She regained the control of her House and estates and recognised the Braganzas royalty.

Due to the participation of the 8th Duke of Aveiro in the Távora affair (a conspiracy against the King), all the possessions of the Dukes of Aveiro were confiscated, their coat-of-arms destroyed from the public places, their houses demolished and their lands salted. Only the Palace of the Dukes of Aveiro in Azeitão, Portugal remains (albeit with the destroyed coat of arms on its facade) as a testament to the family's previous might and power.

Stone memorial of Aveiro's shame in Belém, Lisbon.

The Aveiro palace in Lisbon, demolished and salted, gave place to a stone memorial in order to perpetuate the memory of the shame of the Aveiro House. In it the following text can be read (in Portuguese): Aqui foram arrasadas e salgadas as casas de José Mascarenhas, exautorado das honras de Duque de Aveiro e outras condemnado por sentença proferida na Suprema Juncta de Inconfidencia em 12 de Janeiro de 1759. Justiçado como um dos chefes do barbaro e execrando desacato que na noite de 3 de Septembro de 1758 se havia commetido contra a real e sagrada pessoa de D.José I. Neste terreno infame se não poderá edificar em tempo algum. ("In this place were put to the ground and salted the houses of José Mascarenhas, stripped of the honours of Duque de Aveiro and others, convicted by sentence proclaimed in the Supreme Court of Inconfidences on the 12th of January 1759. Put to Justice as one of the leaders of the most barbarous and execrable upheaval that, on the night of the 3rd of September 1758, was committed against the most royal and sacred person of the Lord Joseph I. In this infamous land nothing may be built for all time.")

After 1759 the title was extinct. However, in 1939, Duarte Nuno, Duke of Braganza, authorized the use of the personal title of Duke of Aveiro to Caetano Henriques Pereira Faria Saldanha de Lancastre, Count of Alcáçovas, who did not use the prerogative. The only legitimate relatives of José de Mascarenhas da Silva e Lencastre, 8th Duke of Aveiro, are descended from his sister Francisca das Chagas Mascarenhas and her husband the 1st Marquis of Lavradio.

List of the dukes of Aveiro
  1. John of Lencastre, 1st Duke of Aveiro (1501-1571), son of Infante George, Duke of Coimbra (therefore grandson of King John II of Portugal);
  2. George of Lencastre, 2nd Duke of Aveiro (1548-1578, in Alcácer Quibir), son of the previous duke;
  3. Álvaro of Lencastre, 3rd Duke of Aveiro (1540-1626), together with his wife and cousin Juliana of Lencastre, 3rd Duchess of Aveiro (1560-1636), daughter of the previous duke;
  4. Raimundo of Lencastre, 4th Duke of Aveiro (1620-1666), grandson of the previous dukes;
  5. Peter of Lencastre, 5th Duke of Aveiro (1608-1673), son of Álvaro and Juliana of Lencastre, 3rd Dukes of Aveiro. Archbishop of Évora, died without issue;
  6. Maria de Guadalupe of Lencastre, 6th Duchess of Aveiro (1630-1715), sister of Raimundo of Lencastre, married the Spanish Manuel Ponce de León, Duke of Arcos;
  7. Gabriel of Lencastre, 7th Duke of Aveiro (1667-1745), son of the previous duchess, died without issue.
  8. José de Mascarenhas da Silva e Lencastre, 8th Duke of Aveiro (1708-1759), collateral line, descending from Álvaro and Juliana of Lencastre through female line. He was executed by the Marquis of Pombal under orders of King Joseph I of Portugal, due to his participation in the Távora affair, a conspiracy against the king.

Other titles

The dukes of Aveyro (Spanish title)

When Peter of Lencastre, 5th Duke of Aveiro died in 1673, his niece Maria de Guadalupe of Lencastre was finally recognised by the Portuguese King as Duchess of Aveiro in 1679, on condition that she return to Portugal although she was married to the Spanish Duke of Los Arcos. Her husband opposed this; she divorced him, returned to her homeland and regained the House of Aveiro and their estates.

While the divorce was pending, King Carlos II of Spain tried to prevent her return to Portugal by granting her, in 1681, the Spanish title of Duchess of Aveyro (Spanish spelling). This title belongs today to the Spanish Carvajal family, with no relationship to the Lancastre family of Portugal. It is not a Portuguese title and is entirely separate from its Portuguese homonym.

Family name

The family name associated with the Dukes of Aveiro is Lancastre, referring to King John I's wife Philippa of Lancaster, daughter of John of Gaunt, 1st Duke of Lancaster and head of the House of Lancaster. The Marquess of Lavradio is currently the Chief of Name and Arms of the Lancastre family in Portugal.

Genealogical summary
John I
(1357-1433)
King of Portugal		Philippa of Lencastre
(1360-1415)
Princess of England
Duarte I
(1391-1438)
King of Portugal
Afonso V
(1432-1481)
King of Portugal		Infante Fernando
(1433-1470)
1st.Duke of Beja
2nd.Duke of Viseu
Ana de MendonçaJohn II
(1455-1495)
King of Portugal		Leonor of Viseu
(1458-1525)		Manuel I
(1469-1521)
King of Portugal
George of Lencastre
(1481-1550)
2nd.Duke of Coimbra		Afonso
(1475-1491)
Crown Prince
JOHN of LENCASTRE
(1501-1571)
1st.Marquis of Torres Novas
1st.Duke of Aveiro		LOUIS of LENCASTRE
(1505-1574)
1st.Comendador-mor
of the Order of Aviz
Comemdadores-mores of Aviz
Dukes of Aveiro
Dukes and Marquises of Torres Novas
Counts of FigueiróKnights of Coruche
Marquises of GouvêaCounts of Vila Nova de PortimãoLords of Alcaçovas
Marquises of LavradioMarquises of AbrantesCounts of Alcaçovas
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See also

Bibliography

"Nobreza de Portugal e do Brasil" – Vol. II, pages 342/347. Published by Zairol Lda., Lisbon 1989.

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