The Beaglier is one of the relatively new hybrids; due to this, there is very little history. There is some, however: the Beaglier is said to have originated in Australia in the 1990s. Knowing the histories of the parent breeds — the Beagle and the Cavalier King Charles Spaniel — will help you to understand your Beaglier.
The Beagle is well-known for possessing an extraordinary sense of smell, and by these olfactory talents (and floppy ears), they have been traced back to their basic beginnings in the 5th century in ancient Greece. In the 11th century, WIlliam the Conqueror took the Talbot Hound to England and it was there that he may have bred the dog with a Greyhound so as to produce a faster dog that retained the Talbot's sharp sense of smell, and that the result was the Southern Hound — which is believed to be the direct ancestor of the Beagle. Several centuries later, in 1830, Great Britain's Reverend Phillip Honeywood was credited for producing the groundwork for the modern-day Beagle. The Beagle was one of the first breeds to be recognized by the American Kennel Club (AKC), and was done so in 1885.
The predecessor of the Cavalier King Charles Spaniel being a Toy Spaniel, a dog that was recorded as far back as the 16th century in paintings by Titian. (There are also accounts that claim the Toy Spaniels were known in the 11th century as hunting dogs.) The Cavalier King Charles Spaniel is named in part after a 17th century English king, Charles I, who took the throne in 1625. Before his death, the king's love for the (Cavalier) King Charles Spaniel was named as such by the very subjects who would eventually mistrust him. The subsequent monarch, King Charles II, was also fond of the dogs and was never without a few from his pack; they followed him everywhere. His love for the breed was such that he authored a decree allowing the King Charles Spaniel to go anywhere, a decree that remains observed in England to this day. As Charles II was known as the "Cavalier King," so too did the prefix become part of the breed's name: Cavalier King Charles Spaniel. The Cavalier King Charles Spaniel was recognized by the AKC in 1995.