Mon

Boys' name

Diminutive of Monica

Mon has been given to 10 babies in the U.S. since 1924. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1924, with 5 recorded.

Babies named Mon, 1989

1 in 768,000

Mon over time, 1880–2025

Boys

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Mon: meaning, origin, and history

Diminutive of Monica

Deeper origin not confirmed in the cited records

What Mon means

Mon is a diminutive of Monica.

Origin, language, and formation

Mon is used in English, Asturian, Catalan and Walloon.

Related names and everyday forms

Related names include Monica, Montserrat and Ramón.

Pronunciation and spelling

In Asturian, Mon is pronounced /ˈmon/.

American usage and historical context

In the United States, 10 boys were recorded with the name Mon between 1924 and 1989. Its highest annual count was 5 in 1924; its best national rank was #4,760 in 1924.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Mon?

Mon had fewer than 5 recorded uses in 2025, so these figures use 1989, the last year it was published.

Among all babies, 1989: 1 in 768,000; 5 of 3,842,268 births
Among boys only: 1 in 400,000; <0.01% of boys
Rank, 1989: Unranked; Fewer than 5 uses
Coin-flip room size: 532,653 kids; Even odds of a second one

Where Mon sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 1989 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%

Class of 30Under 1%

Grade of 100Under 1%

School of 500Under 1%

Put another way: gather 532,653 children born in 1989 and it's an even bet that one of them is another Mon. In a class of 30 the chance is Under 1%.

When Mons were born

Half of everyone ever recorded as Mon was born before 1924 — so the typical Mon is around 101 today.

Median birth year: 1924; About 101 years old
Biggest decade: 1920s; 50.0% of all use
Born in the last 25 years: 50.0%; Spread across generations
Recorded since 1950: 5; People you could plausibly meet

Choose a decade

1920s — 50.0% of all recorded uses (5).

Is Mon rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago: —; Not ranked then
Rank vs 5 years ago: New entry; Not ranked then
Rank vs 10 years ago: —; Not ranked then
Births vs 10 years ago: —; Not published both years
Share of its own peak: 0%; Peak was 1924 (5)
Years since peak: 101; Years
Year-to-year steadiness: Not enough data; Too few years
Best rank ever: #4,760; 1924

Mon by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025: Unranked
Trend vs 5 yrs ago: —
Best rank ever: #4,760; 1924
Peak year: 1924; 5 that year
First recorded: 1924
Last recorded: 1989
All-time count: 10
Count in 2025: Under 5

Names similar to Mon

Matched on shared beginnings and endings, similar length, and comparable popularity.

Moni Mony Monzer Mona Monet Monel Monir Aymon Moneeb Montra Monaco Imon Omon Mondo Montaz Dmon Rmon Limon Dimon Emmon Saymon Samon Money Semon

Sibling names for Mon

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

For a sister

Rosina Kattie Lavon Blanch Jaunita Vernell Dorris Leonora

For a brother

Alvis Eldridge Lacy Delmer Wilton Elwin Domenick Hosea

Explore around Mon

Top names of 1924, Mon's peak year The 1920s in full Other names that peaked in 1924 Boys' names starting with M Asturian Boy Names