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,
Duke of Cambridge was to be created Duke of Cambridge, Earl of Strathearn and Baron Carrickfergus. The letters patent granting these titles received the great seal on 26 May 2011. If Prince William dies before becoming king, then his sons are eligible to inherit the dukedom: Duke of Cambridge Duke of Cambridge, one of the six current royal dukedoms in the United Kingdom, is a hereditary title of specific rank of nobility in the British royal family. The title (named after the city of Cambridge in England) is hereditary among male agnatic descendants of the titleholder by primogeniture, and has been conferred upon