Millie
Meaning: not confirmed (origin debated)
About the name Millie
The origin of Millie is debated, and we couldn't confirm its meaning from a sourced etymology. A commonly cited theory links it to English roots, with the meaning “Gentle strength (short for Mildred or Amelia)”. Treat that as a theory, not a settled fact.
Why we say this: we only state a meaning as fact when a sourced etymology (Wiktionary, with its references) supports it. For Millie we didn't find one we were confident in, so we show the popular explanation as a theory.
It has a vintage feel. In 2025, Millie ranked #73 for girls in the US, with 3,353 babies given the name. Its peak year since 1940 was 2025. Since 2000, 100% of US babies named Millie were girls.
- US rank 2025
- #73
- In 2015
- #469
- Babies in 2025
- 3,353
Popularity of Millie, 1940–2025
Latest SSA data: 2025.
Popularity data: U.S. Social Security Administration national baby names (public domain; names given to at least 5 babies of one sex per year).
Names similar to Millie
Name meanings marked or linked “Wiktionary” are adapted from Wiktionary by Wiktionary contributors, CC BY-SA 4.0; each name page links its source entry.