New Delhi, Aug. 10 -- Prince William reportedly reacted angrily when King Charles III and Queen Camilla suggested that Kate Middleton change the spelling of her first name after joining the royal family, according to a new book about the Princess of Wales.

In his biography Kate! The Courage, Grace, and Power of the Woman Who Will Be Queen, author Christopher Andersen claims the proposal was linked to concerns about royal branding and the number of royal cyphers beginning with the letter C.

"Charles and Camilla each had a royal monogram that consisted of interlocking C's beneath a crown, and they expressed concern that a third royal cypher with a C was overkill. Would Kate mind if she changed the spelling of her full name from 'Catherine...