Alfonso de Borbón Dampierre (1936–1989), also known as the Duke of Segovia and Duke of Anjou, was a pretender to both the French and Spanish thrones. He was the elder son of the Infante Jaime, who in turn was the eldest surviving son of King Alfonso XIII of Spain. His father Infante Jaime renounced all dynastic rights to the Spanish throne a number of times starting in 1933, for himself and future descendants, because of a hearing and speaking disability, but later proclaimed himself the legitimate heir to the French throne and head of the House of Bourbon.

Jaime's claim to the French throne is based on his status as the senior descendant in unbroken male line of Louis XIV, through Louis' grandson Phillipe, who became Felipe V of Spain. Felipe V had renounced his claims to the French throne under the Treaty of Utrecht (1713), but some French legitimists claim that this renunciation was invalid under French law.

Alfonso contracted a morganatic marriage with General Franco's granddaughter. For a time, Franco toyed with the idea of naming Alfonso as his successor, before designating Juan Carlos as the future monarch. Their son, Louis-Alfonso, continues his father's and grandfather's claim as the current Pretender "Duke of Anjou", head of the House of Bourbon, and to some French monarchists, His Most Christian Majesty Louis XX by the Grace of God King of France.