Heidi is a name derived from the Germanic name Adelheid, meaning "noble" and "grace." It is a popular name for girls in many English-speaking countries. Heidi is often associated with the beloved children's book character, Heidi, written by Johanna Spyri. The name is often seen as sweet, gentle, and kind, reflecting the character traits of the book's protagonist. Heidi is a timeless and classic name that has been cherished for generations.