Millie is a diminutive form of Millard, derived from the Old English words 'mille' meaning 'mighty' and 'hard' meaning 'brave'. It has been used as a given name since the Middle Ages.
In British culture, Millie is often associated with the term 'Millie-ann' which means 'dear friend', emphasizing its affectionate connotation. In some African cultures, Millicent is believed to bring good fortune and prosperity.
People named Millie are typically seen as cheerful, optimistic, and energetic individuals who radiate warmth and kindness, often with a playful and adventurous spirit.
Today, the name Millie is gaining popularity worldwide, particularly in the UK and Australia, where it's often given to girls born into loving families and desired for its unique charm.