The Princess of Wales was previously asked to change her name to avoid clashes with two other senior royals.
Although she is often referred to publicly as “Kate,” the royal is still referred to as “Catherine” by many members of the royal family, including her husband. Prince William.
As reported by OK!Kate was asked to change her name as it seemed to conflict with Charles and Camilla – with their names both starting with the letter 'C'.
According to Prince Harrywho spoke about his sister-in-law's name in his impressive memoir Spare, the king and queen wanted Kate to spell 'Catherine' with the letter 'K' instead of a 'C'.
Harry wrote in reserve: 'There were already two royal numbers with a C and a crown above them: Charles and Camilla. It would be too confusing to have another one. Make it Katherine with a K, they suggested.
“I now wondered what came of that suggestion.”
Recalling the moment he and William heard of the question, Harry added in his memoirs: “I turned to Willy and looked at him with a look that said, 'Are you listening to this?' His face was blank.”
Despite the demand, it is noted that the request has not been fulfilled and that Kate has a close relationship with both her father-in-law and his wife.
The Princess of Wales revealed last month that she was undergoing preventive chemotherapy, she shared in an emotional speech to the public.
The mother of three had undergone planned abdominal surgery earlier in January. Although her condition was not thought to be cancer at the time, post-operative tests revealed cancer to be present.
Princess Kate has kept a low profile since her diagnosis and was last photographed during the annual festive celebrations with the family on Christmas Day – just a few weeks before her surgery at The London Clinic in Marylebone.
Kate's diagnosis came just a few weeks after the king shared his own cancer diagnosis in February.
Earlier this year, an expert told how Kate's bond with the king has strengthened since their diagnoses.
Royal biographer Sally Bedell Smith narrates PEOPLE: “He has always had a very good relationship with her. I don't think it's presumptuous to say she's like the daughter he never had.
“He shares with [Prince] William an impulse to protect her. They are in this together, Kate and the King.”
Following news of her diagnosis, Buckingham Palace said the king was “so proud of Catherine for her courage to speak as she did”.