Heidi became known — and popular — via the 1880 eponymous children's classic by Swiss writer Johanna Spyri and, despite decades of American Heidis of all sizes, shapes, and personalities, the name seems permanently tethered to that spunky little girl on the Alpine mountaintop in the book and Shirley Temple movie.

In Sikhism, ajooni is the concept of divine formlessness — a tenet of the religion as Sikhs do not worship idols.

In mythology, Iphigenia was sacrificed by her father, Agamemnon -- a difficult legacy to pass on to a daughter, and only one reason the name is hardly ever used.

Too close to the name of a bodily fluid.

Traditional Yoruba choice for the daughter of delighted parents.