Milly

Milly is a short form of names beginning with the Germanic element mil, most commonly Millicent or Mildred, both of which trace back to Old High German roots meaning strength or gentle strength. Millicent derives from Germanic Amalasuintha-type compounds, combining amal, a dynastic name element, with swinþ, meaning strong, while Mildred comes from Old English mild, meaning gentle, and þryð, meaning strength. Milly has been used as an independent given name in English-speaking countries as well as in Scandinavia, where it functions as a diminutive of similar Germanic compound names. Related forms include Millie, Milli, Millicent, and Mildred.