Princess Eugenie's baby with Jack Brooksbank is not going to have a royal title. The child will be the 11th in line to the throne and the Queen's ninth great-grandchild but he or she will not bear the HRH (His/Her Royal Highness) status or be called a prince or princess.
According to royal expert Emily Nash of Hello!, Princess Eugenie's baby will simply be called a Master or Miss as an adult, just like Prince Harry and Meghan's son, Archie Harrison. The rules of the royal family apparently indicate that the HRH styling and royal titles are only passed down to the male line of the British family.
While Princess Eugenie has a title, her husband, who is a commoner, is simply addressed as Mr. Brooksbank. The York royal's title doesn't automatically transfer to Jack so he's not referred to as a prince.
Consequently, the only way for the Brooksbank baby to inherit a title is if the Queen bestows this to Eugenie's husband. The monarch could issue a Letters Patent to make this change official.
However, granting titles are usually done just after the royals get married. Eugenie and Jack were wedded in October 2018 and the Queen didn't gift them with such an honor despite being reportedly fond of her granddaughter.
According to USA Today, giving titles involves a complicated process that will need the incorporation of customs, precedents and vacancies. The last time Queen Elizabeth granted a title to a commoner groom was during the wedding of her sister, Princess Margaret.
Queen Elizabeth made photographer Antony Armstrong-Jones the 1st Earl of Snowdon. When he died in 2017, his son David became the 2nd Earl of Snowdon.
The Queen also offered a title to Princess Anne's commoner husband, Capt. Mark Phillips. Her Majesty's daughter, however, turned down the offer and agreed with her husband to raise their children, Peter and Zara, as untitled royals. Zara's husband Mike Tindall also didn't receive any title from the Queen when they got married in 2011. In the same manner, Princess Beatrice's husband Edoardo Mapelli Mozzi is also not a titled royal in-law.
Meanwhile, sources said that Princess Eugenie and Jack intend to raise their baby in an environment without royal protocols. The rules are apparently different for the Yorks since they are further down the line of succession and they do not carry public duties on behalf of the Queen.