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,
Catherine, Duchess of Cambridge Cambridges, wrote the letter to media standards organisations in various countries. Catherine is, by marriage, a princess of the United Kingdom and entitled to the style of Royal Highness. She is usually styled as "Her Royal Highness The Duchess of Cambridge". When in Scotland, she is referred to as the Countess of Strathearn. Northern Ireland is represented by a third title, Lady Carrickfergus. In September 2013, the Queen granted a conjugal coat of arms to the Duke and Duchess of Cambridge, consisting of their individual arms displayed side by side, beneath a helm and coronet denoting the duke's status as