Prince Louis of Cambridge Prince Louis of Cambridge Prince Louis of Cambridge (Louis Arthur Charles; ; born 23 April 2018) is a member of the British royal family. He is the third and youngest child and second son of Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge. He is fifth in the line of succession to the British throne. Kensington Palace announced on 4 September 2017 that the Duke and Duchess of Cambridge were expecting their third child. A son was born at 11:01 BST (10:01 UTC) on 23 April 2018. He was first seen in public seven hours after his birth,
Princess Augusta of Cambridge Teck. As such, Princess Augusta was a first cousin of Queen Victoria and aunt to Mary of Teck, later consort of George V. On 28 June 1843, Princess Augusta married her first cousin, Frederick William of Mecklenburg-Strelitz, at Buckingham Palace, London. (The two were also second cousins on their fathers' side.) Upon marriage, Augusta became "HRH" The Hereditary Grand Duchess of Mecklenburg-Strelitz and, on 6 September 1860, "HRH" The Grand Duchess of Mecklenburg-Strelitz following the death of her father-in-law. The marriage of the Grand Duke and Grand Duchess produced two children: Although she spent most of her adult life in