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The short answer
Molly is a medieval English diminutive of Mary, developed from the earlier forms Malle and Molle, and Behind the Name notes it is now often used as an independent given name rather than only as a nickname. Mary's own root, Hebrew Miriam, has a meaning Behind the Name calls uncertain, with theories including "sea of bitterness," "rebelliousness," "wished for child," or an Egyptian origin tied to "beloved" or "love." James Joyce used the name for Molly Bloom in his novel Ulysses (1922). It is pronounced MAH-lee. In the United States, Molly ranked #196 among girls' names in 2025 (Social Security Administration).
Meaning and etymology
Behind the Name describes Molly as a "medieval diminutive of Mary, now often used independently," developed from the earlier medieval forms Malle and Molle. The linked Mary entry states the ultimate meaning of Mary (from Hebrew Miriam) "is not known for certain," listing several competing theories: "sea of bitterness," "rebelliousness," "wished for child," or an Egyptian origin related to mry ("beloved") or mr ("love").
Editorial confidence: uncertain
Linguistic roots
| Language | Form | Meaning |
|---|---|---|
| Hebrew (via Mary) | Miryam | uncertain — theories include "sea of bitterness," "rebelliousness," "wished for child," or an Egyptian root meaning "beloved"/"love" |
Competing or overlapping origins
- Behind the Name notes Mary's own root, Miryam, has several unresolved etymological theories rather than one settled meaning.
Popularity
Molly ranked #196 among girls' names in the United States in 2025, according to db/list-batch.mjs's SSA 2025 figures, matching the rank in the cached Behind the Name snapshot for the same year.
| Region | Year | Rank | Source |
|---|---|---|---|
| United States | 2025 | #196 | ssa-2025 |
Nicknames, variants, and related names
Nicknames: None documented.
Variants: Mollie, Polly, Pollie
Related names: Mary, Maria, Molly Bloom
What the name feels like
Molly has the warm, approachable feel of a name that has functioned as a nickname for so long it now stands entirely on its own, giving it a friendly, unpretentious character distinct from the more formal Mary.
Style tags: classic, friendly, diminutive turned standalone, two syllables
Editorial interpretation: This style read is editorial opinion, not documented etymological fact. Behind the Name records the diminutive history and the literary reference, not a style classification.
If you like this name
Other medieval diminutives that now stand on their own, or names in the wider Mary family.
Similar by origin
Similar by style
Frequently asked questions
What does the name Molly mean?
Molly is a medieval diminutive of Mary. Mary's own root, Hebrew Miryam, has an uncertain meaning, with theories including "sea of bitterness," "rebelliousness," "wished for child," or an Egyptian origin tied to "beloved."
Is Molly short for Mary?
Historically yes — Behind the Name traces it as a medieval diminutive of Mary, developed via the earlier forms Malle and Molle — though it is now commonly given as an independent name.
Is Molly a popular name?
Yes. Molly ranked #196 among girls' names in the United States in 2025, according to Social Security Administration data.
Sources
- Behind the Name: Meaning, origin and history of the name Molly — supports etymology, history.
- Behind the Name: Meaning, origin and history of the name Mary — supports etymology (root gloss).
- U.S. Social Security Administration: Popular Baby Names — national data, year of birth 2025 — supports popularity.
