Infante Alfonso, Duke of Galliera (12 November 1886 – 6 August 1975) was a Spanish infante and military aviator, and a first cousin of King Alfonso XIII.
On 15 July 1909, Alfonso married Princess Beatrice of Saxe-Coburg and Gotha "Princess Bee" (1884–1966), daughter of Alfred, Duke of Saxe-Coburg and Gotha (the second son of Queen Victoria of the United Kingdom).[8] There was a civil ceremony in Schloss Rosenau, followed by a Catholic religious ceremony in St. Augustine's Church in Coburg, and finally a Protestant religious ceremony in Schloss Callenberg.
Alfonso and Beatrice had three children:
Infante Alvaro, Duke of Galliera (20 April 1910 – 22 August 1997)
Alfonso de Orleans (28 May 1912 – 18 November 1936)
Prince Ataúlfo of Orléans (20 October 1913 – 8 October 1974)