Millie

Often used as a standalone name today; historically common as a diminutive for longer English names (such as Mildred, Amelia, or Millicent).

Millie is a classic English-language name that began as a nickname-style form and is now often used as a full given name in its own right. It’s familiar, easy to say, and tends to read as friendly and approachable in everyday use. Historically, Millie has been used as a diminutive for several longer names—commonly Mildred, Amelia, and Millicent among others—so its etymology depends on which longer form a particular family intends. Because of that, Millie is best described as a well-established English diminutive that has become independent. Pronunciation is usually MIL-ee, two syllables with a clear short first vowel. A practical tip is that spelling variants like “Milly” may appear, but the pronunciation is typically the same, and the name naturally supports short forms such as “Mil” if the person prefers them.

Etymology: Millie is widely used in English as a familiar diminutive form. Its specific ‘full-name’ source can vary by family, since it has been used for multiple longer names beginning with ‘Mil-’.