Albert, Duke of Schleswig-Holstein (Albert John Charles Frederick Alfred George; 26 February 1869 – 27 April 1931), was a grandson of Queen Victoria.
He was the second son of Victoria's daughter, Princess Helena, by her husband Prince Christian of Schleswig-Holstein.
He was the head of the House of Oldenburg and also the House of Schleswig-Holstein-Sonderburg-Augustenburg and the Duke of Schleswig-Holstein between 1921 and 1931.