Overview
Dom Pedro II (Peter II; 26 April 1648 – 9 December 1706), nicknamed "the Pacific", was King of Portugal from 1683 until his death, previously serving as regent for his brother Afonso VI from 1668 until his own accession. He was the fifth and last child of John IV and Luisa de Guzmán.
Early life
Third son of King John IV and Queen Luisa, Peter was created Duke of Beja and Lord of the House of the Infantado.
Following his father's death, his mother became regent for the new king Afonso VI, Peter's elder, partially paralyzed, and mentally unstable brother. In 1662, Afonso put his mother away in a convent and assumed control of the state. In January 1668, shortly before Spanish recognition of Portugal's restoration of independence, Peter acquired political ascendancy over his brother and was appointed regent, banishing Afonso to the Azores and, later, Sintra where he died in 1683. Peter thereupon inherited the throne.
From Wikipedia (CC BY-SA 4.0).