Afonso, Duke of Porto
Infante D. Afonso of Braganza, Duke of Porto( 31 July 1865 in Palace of Ajuda, Lisbon – 21 February 1920 in Naples, Italy) was a Portuguese Infante of the House of Braganza, the son of King Dom Luis I of Portugal and his wife, Dona Maria Pia of Savoy.
From 1908 to the abolition of the Portuguese Monarchy in 1910 he was the Prince Royal of Portugal as heir presumptive to his nephew, King Dom Manuel II.
Luís I of Portugal
Dom Luís I( 31 October 1838 in Lisbon – 19 October 1889 in Cascais), known as The Popular( Portuguese: O Popular) was a member of the ruling House of Braganza, and King of Portugal from 1861 to 1889.
The second son of Maria II and Ferdinand II, he acceded to the throne upon the death of his brother Pedro V.
João Fernandes de Andrade
João Fernandes de Andrade( 1470s – 1527) was a Portuguese nobleman, who served in the Court of Afonso V and John II of Portugal.
Gregorio María de Silva y Mendoza, 9th Duke of the Infantado
Gregorio de Silva y Mendoza( born 1649, Pastrana- d. 1693, Madrid) was a Spanish noble from the House of Mendoza.
He was the 5th Duke of Pastrana 9th Duke of the Infantado, 7th Duke of Lerma, 6th Duke of Francavilla, 5th Duke of Estremera, and the Prince of Eboli and Melito.
Álvaro of Lencastre, 3rd Duke of Aveiro
Álvaro of Lencastre( 1540 – 1626) was the son of Afonso of Lencastre, second son of infante George of Lencastre, 2nd Duke of Coimbra.
Martim Afonso de Brito
Martim Afonso de Brito( 14th- century) was a Portuguese nobleman, member of the Court of Afonso IV.
He was appointed Canon of the Archdiocese of Braga.
Leszek II the Black
Leszek II the Black( c. 1241 – 30 September 1288), was a Polish prince of the House of Piast, Duke of Sieradz since 1261, Duke of Łęczyca since 1267, Duke of Inowrocław during 1273- 1278, Duke of Sandomierz and High Duke of Poland since 1279.
Konrad I of Oleśnica
Konrad I of Oleśnica( – 22 December 1366) was a Duke of Żagań and Ścinawa during 1309 – 1312( with his brothers as co-rulers), Duke of Oleśnica, Namysłów, Gniezno and Kalisz during 1312 – 1313( with his brother as co-ruler), Duke of Kalisz during 1313 – 1314( alone), Duke of Namysłów since 1313( alone) and Duke of Oleśnica since 1321 until his death( alone).
He was the second son of Henry III( I), Duke of Głogów, by his wife Matilda, daughter of Albert I, Duke of Brunswick- Lüneburg.
Beatriz, Duchess of Viseu
Infanta Beatriz of Portugal( 13 June 1430 – 30 September 1506) was a Portuguese infanta, daughter of John, Constable of Portugal( fourth son of King John I of Portugal and his wife Philippa of Lancaster) and Isabella of Barcelos a daughter of Afonso I, Duke of Braganza.
Isabel of Barcelos
Isabel of Barcelos( October 1402 – 26 October 1466), also known as Isabel of Braganza, was a lady of the Portuguese nobility during the Late Middle Ages.
She was the daughter of Afonso I, Duke of Braganza and Beatriz Pereira de Alvim, and she married Infante John, Lord of Reguengos de Monsaraz, her half- uncle, son of John I of Portugal.

Question: Where was the place of death of Afonso, Duke Of Porto's father?
Answer: Cascais