* The phrase itself is whimsical and evocative. It suggests a world of magic and adventure, which aligns perfectly with the tone of the film. It's possible the creators chose it simply for its whimsical appeal.
* Bedknobs were a real thing. They were used to secure bedsheets in place, particularly in the early 20th century. While not exactly glamorous, the word has a nostalgic feel.
* Broomsticks are a classic symbol of witchcraft. Their inclusion in the title immediately hints at the magical nature of the story.
* The combination of the two items creates a sense of contrast. The everyday object (bedknobs) juxtaposed with the fantastical one (broomsticks) makes the title both playful and intriguing.
Beyond the film, "Bedknobs and Broomsticks" isn't a common phrase. This makes it even more unique and memorable, likely contributing to the film's enduring popularity.
It's worth noting that while the origin of the specific phrase may be unclear, the concepts of bedknobs and broomsticks were present in British folklore and popular culture long before the film. This suggests that the creators drew inspiration from existing cultural tropes, adding their own unique twist.
Ultimately, the true origin of the phrase "Bedknobs and Broomsticks" may remain a mystery. But that doesn't detract from its effectiveness as a title that captures the essence of the film.