Millie

Millie is a diminutive that has served as a nickname for Mildred, Millicent, Emily, Amelia, and Camilla — all Germanic in origin, rooted in words meaning strength and labor. It carries the charm of a name that feels both vintage and fresh, the kind of nickname that became a name in its own right. Short, sweet, and impossible to say without smiling.

Millie ranks #112 among America's most popular pet names, and it is easy to see why this little name has such staying power. It has the warmth of an old-fashioned nickname — think 1920s parlor charm — combined with the kind of breezy approachability that suits any companion. Millie works beautifully for a pet with a lively, affectionate personality, the one who always seems to be right underfoot, full of energy and eager for attention. It crossed back into mainstream popularity partly through pop culture, cementing its feel-good reputation.