Duke of Viseu (in portuguese Duque de Viseu) was an aristocratic Portuguese title with the level of Royal Dukedom, that is, associated with the Portuguese Royal House, created in 1415, by King John I of Portugal to the prince Henry the Navigator. Events Friedrich I Hohenzollern (b. ... Look up monarch in Wiktionary, the free dictionary. ... João I (pron. ... The term prince (the female form is princess), from the Latin root princeps, when used for a member of the highest aristocracy, has several fundamentally different meanings - one generic, and several types of titles. ... Henrique, Duke of Viseu (March 4, 1394–November 13, 1460); pron. ...

The family name associated with the Ducal House of Viseu is Lencastre or Lancastre, derived from the wife of King John I of Portugal, Philippa of Lancaster, daughter of John of Gaunt, 1st Duke of Lancaster and founder of the House of Lancaster, and Aviz. Location  - Region  - Subregion  - District or A.R.   {{{Region}}} {{{Subregion}}} Viseu Mayor  - Party Fernando Ruas PSD Area 507. ... João I (pron. ... Philippa of Lancaster (1359 - July 19, 1415) was an English princess, daughter of John of Gaunt, 1st Duke of Lancaster by his wife and cousin Blanche of Lancaster. ... John of Gaunt, 1st Duke of Lancaster (June 24, 1340 - February 3, 1399), the third surviving son of King Edward III of England, gained his name because he was born at Ghent in 1340. ... There were several Dukes of Lancaster in the 14th and early 15th Centuries. ... The House of Lancaster is a dynasty of English kings. ... The House of Aviz is a dynasty of kings of Portugal. ...

Its holders were:

1. Henri the Navigator, Prince of Portugal (1394-1460)
2. Ferdinand of Portugal, 1º Duke of Beja (1433-1470)
3. John of Viseu, 2º Duke of Beja (1448-1472)
4. Diogo of Viseu, 3º Duke de Beja (1450 - 1484)
5. King Manuel of Portugal (1469-1521)
6. Miguel of Braganza (n.1878 - ?)
7. Miguel of Braganza (n.1946) (brother of Duarte Pio, Duke of Braganza)