Baby Sussex is named as Archie Harrison Mountbatten-Windsor
The name is believed to have little precedent within the modern British royal family.
The couple shared the news on Instagram with an image of Queen Elizabeth and the Duke of Edinburgh meeting their newest great-grandchild.
Read more here:
https://www.cnn.com/uk/live-news/royal-baby-pictures-name-meghan-harry-gbr-intl/index