A title given to certain male members of a royal family, abbreviated HRH.
Ladies and gentlemen, I present to you His Royal Highness The Prince of Wales.
Wiktionary
His-royal-highness Sentence Examples
As harpist to His Royal Highness The Prince of Wales, Jemima Phillips is one of the leading young harpists of her generation.
Born in 1961, Princess Diana gained worldwide fame during her courtship, engagement and subsequent marriage to His Royal Highness Charles, Prince of Wales.
Both Her Majesty Queen Elizabeth and His Royal Highness Prince Charles have given Burberry Royal Warrants.