Beatrice and Edoardo Mapelli Mozzi named their first daughter, born on September 18, Sienna Elizabeth Mapelli Mozzi. The name pays tribute to Queen Elizabeth II, as well as giving a nod to Edoardo’s Italian heritage.
Sienna and Beatrice both have Her Majesty’s first name as their middle name, in tribute to the monarch.
Other royals whose names pay tribute to the monarch include Lady Louise and Charlotte.
Announcing their child’s birth on social media, Beatrice and her husband wrote: “We are all doing well and Wolfie is the best big brother to Sienna.”
Edoardo added on Instagram: “Our life together has just begun, and I can’t wait to see all the amazing things that await us.
“Feeling so much love and gratitude for my amazing wife, baby Sienna and Wolfie.
“These are the days I never want to forget. This week, a friend said to me the sweetest saying….that with every child you grow a whole new heart.”
Prince Edward and Sophie, Countess of Wessex’s daughter’s full name is Lady Louise Alice Elizabeth Mary.
The Duke and Duchess of Cambridge’s daughter is named Princess Charlotte Elizabeth Diana, also paying tribute to Prince William’s mother the late Princess of Wales.
READ MORE: How Princess Beatrice paid tribute to two royal women with baby name
Beatrice gave birth to Sienna, a girl weighing 6lb 2oz, at 11.42pm on Saturday, September 18 at the Chelsea and Westminster Hospital in London, Buckingham Palace announced in a statement.
She wrote on Twitter: “So delighted to share the news of the safe arrival of our daughter.”
Her mother Sarah, Duchess of York, was described by a family friend as being “absolutely over the moon”.
Beatrice’s sister, Princess Eugenie, posted her congratulations on Instagram to “dearest Beabea and Edo” for their “angel”.
Members of the Royal Family are expected to approach the Queen for advice on a baby name out of respect.
According The Sun, when Beatrice was born in 1988, the Queen did not approve of Sarah Ferguson and Prince Andrew’s first choice for her baby name.
The couple are said to have preferred the name Annabel for their baby, but the Queen did not approve.
The couple’s second name choice, Victoria, is claimed to have been rejected by the Queen.
However, it is believed Her Majesty recommended the name Beatrice, which is related to Queen Victoria’s youngest daughter, Princess Beatrice.
Prince Harry and Meghan Markle’s also named their daughter after the monarch, but opted for a personal nickname.
The Sussex’s daughter, Lilibet Diana Mountbatten-Windsor, is named after the Queen’s personal nickname, used by Prince Philip and King George V.
A Palace source told the BBC Her Majesty was not told by Meghan and Harry about naming their daughter after her.
The Sussex’s spokesperson said however: “The Duke spoke with his family in advance of the announcement – in fact his grandmother was the first family member he called.
“During that conversation, he shared their hope of naming their daughter Lilibet in her honour. Had she not been supportive, they would not have used the name.”