Nobility. Italian military commander belonging to the d'Avalos family of Spanish origin. Alfonso Felice was the eldest son of Francesco Ferdinando d'Avalos, governor in the Duchy of Milan and Viceroy of Sicily and his wife, Isabella Gonzaga, of the house of the Dukes of Mantua. The younger brother Tommaso, born in 1571, would have been launched on an ecclesiastical career. On his father's death in 1571, he was succeeded as 3rd prince of Francavilla, 3rd prince of Montesarchio, 4th marquis of Vasto, 8th marquis of Pescara, count of Monteodorisio. At 19, in 1583, Alfonso Felice married Lavinia Feltria Della Rovere in Pesaro. The couple resided at that time in Casalmaggiore (a possession of the d'Avalos family since 1568) due to the appointment of Alfonso Felice as cavalry officer in Flanders, under the orders of Alessandro Farnese. In 1584 Alfonso Felice finally received the order to leave for Flanders, while his pregnant wife returned to Pesaro. Between July and August 1585 Alfonso Felice took part in the siege of Antwerp. In the same year the eldest daughter of the Isabella family was born and on 5 December, taking advantage of a truce, the marquis returned to Pesaro to rejoin the family. In the last days of April 1586 the marquis returned to Flanders, while Lavinia resided in the fortress of Novellara, again expecting a child. She will give birth to her second daughter Caterina in Pesaro in August. In September 1586 Alfonso Felice took part in the battle of Zutphen. In the last days of November Lavinia and her two daughters arrived in Casalmaggiore, where Alfonso Felice also arrived shortly thereafter, who was promoted by Alessandro Farnese, on the orders of Philip II, in light of the success of the campaign in Flanders, with the position of general of the light cavalry of Flanders (dated 20 December 1586), also receiving the collar of the order of the Golden Fleece. While preparations were underway for the invincible army's expedition against the kingdom of England, the position of cavalry general became vacant, due to the death of the previous holder, Robert de Melun, viscount of Gent and marquis of Roubaix. , which took place on 4 April 1585 during the siege of Antwerp. Two options had been presented to replace him: on the one hand, the Spaniard Alfonso Felice d'Avalos, on the other, the Walloon Emmanuel de Lalaing, Marquis of Renty. As can be seen from the correspondence between Philip II and Alessandro Farnese, the d'Avalos was, for political reasons, the preferred choice of the two. Philip II then urged the dispatch of a dispatch with the appointment to Alfonso Felice. The latter accepted it, notifying his consent to the sovereign's adviser Juan de Idiáquez y Olazábal. In September 1587, the third son of Alfonso Felice was born, named in memory of his grandfather Ferrante Francesco. He had as godfather the king of Spain, represented by the Duke of Terranova, Don Carlo d'Aragona Tagliavia, at the time Governor of the Duchy of Milan. The Marquis Alfonso Felice was again in Flanders. Alfonso Felice was able to return to Italy for good only in 1589, tired and ill. A few days later, in June, Lavinia gives birth to the couple's fourth daughter, Maria. In August 1590 the only son of Alfonso and Lavinia died. In 1592 the Duke of Parma went to the baths of Spa, hoping to obtain help for his ailments, together with a retinue that included among others the Prince of Ascoli, the Marquis del Vasto and Don Rodrigo Niño Laso de la Vega. Alfonso Felice's health conditions worsened over the course of the year with recurrent dizziness and paralysis. Also in 1592 he was involved as a witness, in a matter of honor between the Duke of Mantua and the Duke of Parma. The matter required the intervention of the pope and the king of Spain, who commissioned the Duke of Urbino to act as peacemaker. Lavinia herself intervened personally in settling the dispute. In 1593 we find Alfonso Felice as general of the cavalry of the duchy of Milan, replacing Alonso Martínez de Leiva, appointed lieutenant of Alonso Pérez de Guzmán y Sotomayor, duke of Medina Sidonia and general of the infantry embarked on the Invincible Army. In the same year, in the month of May, the marquise, together with her children, went to Pesaro together with her brother-in-law, the religious Tommaso d'Avalos. Alfonso Felice, having obtained a license, joined them in June. Also due to his health problems, he went shortly afterwards to Procida and Ischia at the thermal baths. In November he arrived in Rome to support the appointment to cardinalate of his brother Tommaso where he died of a stroke.