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,
Sacha Hamilton, Duchess of Abercorn wife of George Mountbatten, 2nd Marquess of Milford Haven, elder maternal uncle of the Duke of Edinburgh. The Torby sisters were third cousins of the prince through their common ancestor, Tsar Nicholas I. The Duchess of Abercorn was a close friend of the Duke of Edinburgh, and her sister, the Duchess of Westminster, is a godmother of Prince William, Duke of Cambridge. The Duke of Abercorn was a first cousin of John, 8th Earl Spencer, father of Diana, Princess of Wales, through their mutual ancestor James Hamilton, 3rd Duke of Abercorn. She was the eldest daughter of Lt.-Col. Harold Pedro