Prince William was reportedly left 'seething' after King Charles and Queen Camilla made an unexpected request involving Kate Middleton, which a royal biographer claims sparked a private family disagreement behind palace walls. The alleged dispute was not over royal duties or protocol, but over the spelling of the Princess of Wales' name.
According to royal biographer Christopher Andersen, Charles and Camilla wanted Kate, born Catherine Elizabeth Middleton, to change the spelling of her first name from 'Catherine' to 'Katherine' as part of a royal branding effort. William reportedly viewed the suggestion as deeply personal and refused to consider it, while Kate is said to have been equally opposed to altering the name her parents gave her.