Prince Alexander John of Wales

This is a list of the 42 grandchildren of the British Queen Victoria (1819–1901, queen from 1837, married 1840) and her husband Prince Albert (the Prince Consort, 1819–1861), each of whom was therefore either a sibling or a first cousin to each of the others. It also lists Victoria and Albert's 9 children and 87 great-grandchildren, as well as the spouses of those children and grandchildren who married.

Victoria and Albert had 20 grandsons and 22 granddaughters, of whom two (the youngest sons of Prince Alfred and Princess Helena) were stillborn, and two more (Prince Alexander John of Wales and Prince Harald of Schleswig-Holstein) died shortly after birth. Their first grandchild was the future German Emperor Wilhelm II, who was born to their eldest child, Victoria, on 27 January 1859; the youngest was Prince Maurice of Battenberg, born on 3 October 1891 to Princess Beatrice (1857–1944), who was herself the last child born to Victoria and Albert and the last child to die. The last of Victoria and Albert's grandchildren to die (almost exactly 80 years after Queen Victoria herself) was Princess Alice, Countess of Athlone (25 February 1883 - 3 January 1981).

Just as Victoria and Albert shared one grandfather (Duke Francis of Saxe-Coburg-Saalfeld) and one grandmother (Countess Augusta Reuss) in common, two pairs of their grandchildren married each other. In 1888, Princess Irene of Hesse and by Rhine, whose mother was Queen Victoria's daughter Alice, married Prince Henry of Prussia, a son of Victoria's daughter Victoria. Another of Alice's children, Grand Duke Ernest Louis of Hesse, married Princess Victoria Melita, a daughter of Alice's brother Alfred, Duke of Saxe-Coburg and Gotha, in 1894, but divorced in 1901.

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