Princess Eugenie and Jack Brooksbank have a new addition to the family — and, for the first time across their three children's birth announcements, the palace isn't saying who she is yet.

Buckingham Palace confirmed on August 4 that Princess Eugenie and her husband "are delighted to announce the safe arrival of their daughter," born Monday, August 3, at 6:20 p.m. at a hospital in Lisbon, Portugal. The baby weighed 6 pounds 9 ounces. King Charles, Queen Camilla and the rest of the royal family were "delighted to be informed of the news," according to the official statement.

A first daughter, after two sons

The baby is Eugenie and Jack's third child and first daughter. Their sons — August, born in 2021, and Ernest, born in 2023 — both had their full names revealed within days of birth. This announcement stopped at "daughter." No name, no middle names, no explanation.

What their sons' names hint at

If the family's past choices are any guide, the new arrival's name won't be random. August Philip Hawke Brooksbank nods to Prince Albert (born Franz August Karl Albert) and to Eugenie's grandfather, Prince Philip. Ernest George Ronnie Brooksbank honors King George V (born George Frederick Ernest Albert), Jack's father George, and Eugenie's maternal grandfather, Major Ronald Ferguson. Whatever name the family lands on for their daughter, royal watchers expect the same pattern: a tribute hidden in plain sight.

Born into a packed royal summer

The birth lands in the middle of an unusually busy few weeks for the wider family. King Charles and Queen Camilla have been attending the Commonwealth Games in Glasgow, where Prince William and Princess Kate brought George, Charlotte and Louis to watch the netball final and a session at the velodrome. Royal engagements continue through mid-August, including the Edinburgh International Festival.

For now, the family is keeping the details — including the baby's name — to itself. Past pattern suggests that won't last: both August's and Ernest's names became public within about two weeks of their births.

This story will be updated as Buckingham Palace shares more details.