Pedro III (pronounced [ˈpedɾu]) or Peter III (July 5 1717 – May 25 1786) became King-consort of the Kingdom of Portugal and Algarves by the accession of his wife and niece Queen Maria I in 1777, and co-reigned alongside her until his death. Pedro was the younger son of John V of Portugal and Mary Anne of Austria. Pedro was a younger brother of Joseph I of Portugal. Their maternal grandparents were Leopold I, Holy Roman Emperor and Eleonore-Magdalena of Pfalz-Neuburg. Pedro married Maria, Princess of Brazil, in 1760, at which time she was the heir to the throne then held by his brother José I. According to custom, Pedro thus became prince of Brazil in right of his wife. They had six children, of whom the eldest surviving son succeeded Maria as João VI on her death in 1816. Pedro made no attempt to participate in government affairs, spending his time hunting or in religious exercises.
Ancestors
| Peter III of Portugal | Father: John V of Portugal | Father's father: Peter II of Portugal | Father's father's father: John IV of Portugal |
| Father's father's mother: Luisa of Medina-Sidonia (Luisa de Guzmán) | |||
| Father's mother: Maria Sophia of Neuburg | Father's mother's father: Philipp Wilhelm, Elector Palatine | ||
| Father's mother's mother: Magdalene of Bavaria | |||
| Mother: Mary Anne of Austria | Mother's father: Leopold I, Holy Roman Emperor | Mother's father's father: Ferdinand III, Holy Roman Emperor | |
| Mother's father's mother: Maria Anna of Spain | |||
| Mother's mother: Eleonore-Magdalena of Pfalz-Neuburg | Mother's mother's father: Philipp Wilhelm, Elector Palatine | ||
| Mother's mother's mother: Elisabeth of Hessen-Darmstadt |
Marriages and descendants
Pedro III married his niece, Maria I of Portugal on June 6, 1760.
| Name | Birth | Death | Notes |
|---|---|---|---|
| By Maria I of Portugal (December 17, 1734-March 20, 1816; married on June 6 1760) | |||
| Prince Joseph | August 20 1761 | September 11 1788 | Titled Prince of Brazil and earlier Prince of Beira. Married his aunt Maria Francisca Benedita, Infanta of Portugal, but had no issue. |
| Infante João Francisco | September 16 1763 | October 10 1763 | |
| Prince John Maria | May 13 1769 | March 26 1826 | Prince of Brazil from 1788 until he succeeded Maria I as the 27th (or 28th according to some historians) King of Portugal. |
| Infanta Maria Clementina | June 9 1774 | June 27 1776 | |
| Infanta Maria Isabel | December 23 1766 | January 14 1777 | |
| Infanta Mariana | December 15 1768 | November 2 1788 | Married Gabriel, prince of Spain, son of Charles III. |
See also: List of Portuguese monarchs
| Preceded by Mariana Victoria of Spain | King consort of Portugal 24 February, 1777 - 25 May, 1786 | Succeeded by Charlotte of Spain |
