He was also the youngest son of Infante Juan, Count of Barcelona and Princess María de las Mercedes of Bourbon-Two Sicilies, and the grandson of King Alfonso XIII.

Alfonso was born at Hotel NH Firenze Anglo American in Rome,[1] the youngest son of the Infante Juan of Spain, Count of Barcelona, and of his wife, Princess Maria Mercedes of Bourbon-Two Sicilies.

His godfather was the Infante Alfonso de Orleans y Borbón; his godmother was his father's sister Infanta Maria Cristina of Spain.

The Spanish Embassy in Portugal issued an official communiqué:[9] Alfonso had won a local junior golf tournament earlier on the day, then went to evening Mass and rushed up to the room to see Juan Carlos who had come home for the Easter holidays from military school.

[15] The funeral liturgy for Alfonso was held on Holy Saturday and was presided over by Monsignor Fernando Cento, Apostolic Nuncio to Portugal.