Captain Haddock the time of their last completed and published adventure, "Tintin and the Picaros", Haddock had become such an important figure that he dominates much of the story. Captain (Archibald) Haddock's ancestor, Sir Francis Haddock, is hinted at being the illegitimate son of the French Sun King (Louis XIV), a possible reference to Hergé's own family history— Hergé liked to believe that his father was the illegitimate son of the Belgian king Leopold II. As Hergé was considering names for his new character, he asked his wife, Germaine, what she had cooked for dinner. She told him, “a sad English fish—haddock.”
Harry Haddock was never booked, sent off, or even admonished by a referee. The latter match would prove to be his final international appearance, as despite his selection in the 1958 FIFA World Cup squad, he did not feature in the finals in Sweden. Haddock was voted Rex Kingsley Footballer of the Year for the 1958–59 season, aged 34. In addition to his six full international appearances, Haddock was also selected to play in seven Scottish League XI matches. Haddock also played for a Glasgow Select XI on seven occasions, captaining the side on his last appearance. Haddock died in Rutherglen, Glasgow