A little more discussion...

So I was trying to find what an April Witch was when I found a Swedish book called "The April Witch" which has some resemblance to Bradbury's story. The link is in the title. I have no clue if this book is a reference to the story or if an April Witch is something outside of his writings. In the story, he says it as if we should know what one is, so I feel like there must be a myth or something behind it. Maybe one of you has heard it or can find it? Maybe it's just something he came up with all on his own.