Duke of Abrantes (unrelated to the Spanish and French titles) is a title of Portuguese nobility. It is the only one that was officially recognised by the Kingdom of Portugal. It was created by decree of King Joseph I of Portugal, on 9 December 1753, for Ana Maria Catarina Henriqueta de Lorena, 3rd Marchioness of Abrantes and 9th Countess of Penaguião.[1]
The King advanced Dona Ana Maria de Lorena, 3rd Marchioness of Abrantes, to the rank of duchess (vitalício) upon her appointment as The Queen's Maid of Honour (Camareira-Môr), the highest court position for ladies. The title was subsequently revived for the same reason in favour of her daughter Maria Margarida, considered to be the "2nd Duchess".