Princess Charlotte could be given the Duchess of Edinburgh title in a "fitting" tribute to her great-grandmother the Queen, a royal insider has claimed.
Prince William's second child, who is third in line to the throne after her father, the Duke of Cambridge, and brother Prince George, could receive the title - that once belonged to the Queen - as King Charles wants to "honour the line of succession", according to a source.
It has been claimed that King Charles III has not made his younger brother Prince Edward the Duke of Edinburgh as he is saving the title for seven-year-old Charlotte.
Edward had been expected to inherit the title after Prince Philip's death last year, but it was withheld.
A source told the Daily Mail : "Discussions are underway, but the favoured outcome for the King is that this title ought to go to Princess Charlotte.
"It would be a fitting way to remember the Queen – who, of course, had the title Duchess of Edinburgh – and a way for His Majesty to honour the line of succession."
When Catherine, Princess of Wales, was expecting her first child, George, rules around the line of succession were changed to allow girls to have the same rights as their brothers - meaning Charlotte's position was not affected by the arrival of her younger brother Prince Louis.
The source said it is "constitutionally significant" that Charlotte should be given the Duchess of Edinburgh title.
The Duchess of Edinburgh title previously belonged to the late Queen Elizabeth, who received it after marrying Prince Philip in 1947 and kept it until she became monarch.
When William ascends to the throne, Charlotte could be given the title of The Princess Royal - which Princess Anne has held.
According to a post shared on the royal family’s social media accounts in August 2020 when celebrating Princess Anne's birthday, the title follows some specific rules.
"HRH The Princess Anne was named The Princess Royal, a title traditionally bestowed upon the eldest daughter of The Sovereign, in 1987," it read.
"HRH is the seventh Princess Royal, following Princess Mary, the only daughter of King George V."
Buckingham Palace did not comment on the story.