In the United States this form was more popular than the full form Elizabeth from 1958 to 1978, and was in fact the top ranked American name between 1962 and 1969.
It was used by Shannon Hale in her fantasy novel The Princess Academy, in which the main character was named this. She was named for the small, sturdy pink 'miri flowers' that bloomed on mountains, therefore in that context the name meant "flower".