is a term used to categorize the last four rulers of the Kingdom of Portugal, and their families, from 1853 until the declaration of the republic in 1910. Its name derives from the four kings descended in a patrilineal line from King Ferdinand II of Portugal (of the House of Saxe-Coburg and Gotha-Koháry) and in a matrilineal line from Queen Maria II of Portugal (of the House of Braganza).
