MallowbyNames

Milli

MIL-ee · Of uncertain origin, possibly a diminutive of names like Millicent or a modern coinage inspired by the unit prefix 'milli-'.

2025 rank (girls)
#4,265
Babies named in 2025
33
Peak popularity
2022
2025 frequency
1 in 48,705 girls
Usually for
Girls
Trend
Rising since 2003

Rising since 2003, #4,265 for girls today.

Popularity of Milli since 2002

Babies named Milli per year in U.S. Social Security records.

13263920102020Most births 2022Girls
Data table (by decade)
DecadeGirls
2000s59
2010s208
2020s187

Meaning & origin

Milli is a modern name that entered the U.S. naming landscape in 2002, a relatively recent addition compared to traditional names. Its trajectory has been steadily rising since 2003, reflecting a growing appeal for concise, melodic names ending in 'i'. As of 2025, the name ranks 4,265th, with approximately 1 in 48,705 newborn girls receiving it, and it reached its peak popularity in 2022. While it does not appear in any top state lists, its consistent upward trend suggests it is gaining favor among parents seeking an uncommon but soft-sounding name. The etymology is unclear; it may be a diminutive of Millicent or a creative respelling of Milly, or it could be derived from the metric prefix 'milli-', giving it a subtle scientific flair.

Milli is a relatively modern name that first appeared in U.S. records in 2002. It may have originated as a nickname for Millicent or similar names, or been inspired by the metric prefix 'milli-' meaning one-thousandth, giving it a scientific connotation. The name has seen a steady rise in usage since the early 2000s.

Nicknames & variants

Nicknames: Mil

Variants: Milly

Sibling names for Milli

Names that share Milli's style, for a brother or sister.

Sisters: Mila, Lily, Ellie, Maisie, Ruby

Brothers: Milo, Leo, Finn, Theo, Jake

A parent animal hugging its little one, the personalized name page

M is for Milli, our favorite little girl.

M is for Milli…”

In a Mallowby alphabet book, Milli's letter becomes Milli's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Milli's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Milli mean?
The meaning of Milli is uncertain. It is possibly a diminutive of names like Millicent or a modern invention inspired by the metric prefix 'milli-'.
How popular is the name Milli?
As of 2025, Milli ranks 4,265th in the U.S., with about 1 in 48,705 girls given the name that year. Its peak popularity was in 2022.
Is Milli a boy or girl name?
Milli is almost exclusively used as a girl's name.