Question: where does the name cavalier king charles spaniel come from

title: Cavalier King Charles Spaniel
text: The Cavalier King Charles Spaniel and the English Toy Spaniel can be often confused with each other . In the United Kingdom , the English Toy Spaniel is called the King Charles Spaniel while in the United States , one of the colours of the Toy Spaniel is known as King Charles . The two breeds share similar history and only diverged from each other about 100 years ago . There are several major differences between the two breeds , with the primary difference being the size . While the Cavalier weighs on average between 13 to 18 pounds ( 5.9 to 8.2 kg ) , the King Charles is smaller at 9 to 15 pounds ( 4.1 to 6.8 kg ) . In addition their facial features while similar , are different ; the Cavalier 's ears are set higher and its skull is flat while the King Charles 's is domed . Finally the muzzle length of the Cavalier tends to be longer than that of its King Charles cousin .