Eugenie, niece of King Charles and youngest daughter of his brother Prince Andrew and the Duchess of York, Sarah Ferguson, gave birth almost a week ago.
Ernest George Ronnie Brooksbank, the 13th in line to the British throne, was born on May 30 and weighed 7lbs 1oz, a palace statement said.
Eugenie, the younger daughter of Prince Andrew and his ex-wife Sarah Ferguson, the Duchess of York, shared pictures of the newborn on Instagram, one of which showed the baby lying in a crib, his head covered in a blue and white hat.
The boy was named after his great-great-great-grandfather George, his grandfather George and Eugenie’s grandfather Ronald, she said in the post.
“Augie is loving being a big brother already,” Eugenie wrote on the post which had another picture of the baby’s brother, August Philip Hawke Brooksbank, 2, placing a hand on the baby’s head.
In the post it appeared Ernest was wearing the same hat his brother August did, for his social media debut two years ago.