Zara and Mike Tindall have named their new baby daughter Lena Elizabeth.
The Queen's granddaughter Zara gave birth to her second child, weighing 9lb 3oz, at Stroud Maternity Unit in Gloucestershire on Monday July 18.
A spokeswoman for the couple said: "The name is Lena Elizabeth. It was just a name they liked."
Lena is pronounced Lay-na and Elizabeth is in honour of Zara's grandmother the Queen.
The newest addition to the royal family is a younger sister to four-year-old Mia Tindall.
Lena is 19th in line to the throne and the Queen and the Duke of Edinburgh's seventh great-grandchild.
In 2014, Mike Tindall unveiled Mia's name via his Twitter account, saying: "For everyone who has asked what our daughters name, it's Mia Grace Tindall."
The baby is also a second cousin to Prince George and Princess Charlotte and their younger brother Prince Louis, who was born just under two months ago.
She is not an HRH, does not have a title and will be simply Miss Tindall.