Photo: John Stillwell/Pool via Reuters
By Guy Faulconbridge and Alistair Smout
The prince, who is fifth in line to the British throne, was born at 1001 GMT on April 23 weighing 8 lbs 7oz.
Louis is William's fourth name as well as being that of Earl Mountbatten, to whom William's father Prince Charles was particularly close. Mountbatten was the uncle of Prince Philip, 96, great-grandfather of the new prince.
Charles, heir to the throne, has said it was a great joy to have another grandchild.
William and Kate now have three children: Louis joins Charlotte, 2, and George, 4.
For a boy, the leading bets were for Albert, Arthur, Alexander, James and Philip. The betting odds indicated just a 5 percent chance of Louis.
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