Joana, Princess of Beira (18 September 1635 – 17 November 1653; Portuguese pronunciation: [?u'?n?]; English: Joan) was a Portuguese infanta (princess), the eldest surviving daughter of John IV, King of Portugal (the first of the House of Braganza) and his wife Luisa de Guzmán (Luísa de Gusmão), and as such was styled Princess of Beira.