Sophia Girl
soh-FEE-uh
“wisdom” · Greek
#5
Millie
GirlEnglish, Germanic· “diminutive of Mildred or Millicent”
- Meaning
- diminutive of Mildred or Millicent
- Origin
- English, Germanic
- Pronunciation
- MIH-lee
- Syllables
- 2
- US rank 2025
- #73
- US babies 2025
- 3,353
- Best rank
- #73 (2025)
- Peak year
- 2025
Meaning and origin of Millie
Millie is an English and Germanic name that is usually said to mean “diminutive of Mildred or Millicent”.
Millie started as a pet form of older names such as Mildred, from Old English words meaning gentle and strength, and Millicent, from Germanic elements usually read as work and strength. It is also used as a nickname for Amelia and Camilla. In Britain and more recently in the United States, Millie has become popular as a name on its own, part of a wider revival of cozy, old-fashioned nicknames like Ellie, Hattie and Lottie. It sounds sweet and warm while still feeling grounded. If you want a longer name to fall back on, Amelia or Millicent both lead to Millie.
Other spellings with the same sound: Milly, Milli.
Popularity over time
Millie has been given to babies in the United States since at least 1880, the first year of Social Security records. It has ranked in the top 1,000 in 104 different years. It is at its all-time high right now: 2025 brought both its best national rank, #73, and its highest count, 3,353 babies. Use has grown 392% in ten years.
Its national rank moved from #298 in 1920, #624 in 1950, #2,001 in 1980, #2,008 in 2000, #861 in 2010, and #73 in 2025. Of the 45,926 US girls named Millie since records began, 31% were born in the 2020s, its biggest decade. The 2010s come next, with 6,860 babies.
Other girls' names that peaked around the same time include Eden, Ayla, Emery, Daisy, and Maeve.
Where it is most popular (2025)
In 2025, Millie ranked highest in Utah, Wyoming, and Idaho.
Gender, sound and spelling
In the US it is used almost only for girls.
Millie is usually pronounced MIH-lee, with two syllables. It has six letters, starts with M and ends in “-ie”. Names that sound the same but are spelled differently include Milly and Milli.
Middle names for Millie
A few middle names that flow with Millie: each avoids a matching first letter, a rhyme and a vowel clash where the names meet.
Sibling names for Millie
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Lists that include Millie
Frequently asked questions
What does the name Millie mean?
Millie is an English and Germanic name that is usually said to mean “diminutive of Mildred or Millicent”.
What is the origin of the name Millie?
Millie has English and Germanic roots. Millie started as a pet form of older names such as Mildred, from Old English words meaning gentle and strength, and Millicent, from Germanic elements usually read as work and strength.
Is Millie a popular name?
Yes. Millie ranked #73 in the US in 2025, which makes it one of the 100 most popular names.
Is Millie a boy or girl name?
Millie is mainly a girl's name. In the US it is used almost only for girls.
How do you pronounce Millie?
Millie is usually pronounced MIH-lee. Stressed syllables are in capital letters.
Popularity figures come from US Social Security card applications (names given to at least five babies in a year, 1880 to 2025). How we source names and meanings