Catherine, Duchess of Cambridge, the wife of Britain's Prince William, gave birth to a son, Prince Louis, the royal family announced Monday, April 23, 2018. The newest arrival to the royal family weighs 8lbs 7oz.

Catherine, Duchess of Cambridge, the wife of Britain's Prince William, gave birth to a son, Prince Louis, the royal family announced Monday, April 23, 2018. The newest arrival to the royal family weighs 8lbs 7oz.

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Prince Louis: Surprise choice for royal baby name

The Duke and Duchess of Cambridge have named their third child Louis Arthur Charles, a choice that confounded expectations.