Miguel da Paz, Hereditary Prince of Portugal and Prince of Asturias and Girona (Portuguese: Miguel da Paz de Trastâmara e Avis, Portuguese pronunciation: [miˈɣɛl dɐ ˈpaʃ]; Spanish: Miguel de la Paz de Avís y Trastámara, "Michael of Peace") (23 August 1498 – 19 July 1500) was a Portuguese royal prince, son of King Manuel I of Portugal and his first wife, Isabella of Aragon, Princess of Asturias.

He was shortly sworn heir to the various Iberian crowns by the courts of Portugal, Castile and Aragon.

Maria gave birth to Manuel's eventual successor, John III and to several other children.

[4] The hopes of Isabella I and Ferdinand II to unite all of the Iberian kingdoms vanished with Miguel's death.

[1] His aunt Joanna inherited Castile, León and Aragon, and it was her grandson Philip II who established a short-lived Iberian Union.