Duke_of_Faial
Duke of Faial (Portuguese: Duque do Faial) was a Portuguese title of nobility, named for Faial Island in the Azores, which was granted by royal decree of Queen Maria II of Portugal, dated from 4 April 1833, to Pedro de Sousa Holstein, a 19th-century politician who served as Portugal's first prime-minister. Two months later, on 16 June, Sousa Holstein successfully petitioned the Queen to change the title from Duke of Faial to Duke of Palmela, which he used for the rest of his life.
On 1 December 1834, less than a year from the abolition of the Faial ducal title for Palmela, Queen Maria II created the title of Marquis of Faial, to be used as a substantive title to the heirs of the Dukes of Palmela. Since 1834, the heir of the Duke of Palmela is always referred to as the Marquis of Faial.