Given name & surname · also Celtic

Merlin

Merlin is used as a given name and a surname. One Welsh interpretation is “of the sea fortress; in Arthurian legend, the wizard and mentor of King Arthur.”

Original WelshMyrdhin

Meaning & origin

What it means

One Welsh interpretation is “of the sea fortress; in Arthurian legend, the wizard and mentor of King Arthur.”

Where it comes from

This spelling has been associated with Welsh and Celtic naming traditions.

How it developed

From Middle English Merlyn, from Medieval Latin Merlinus, from Old French Merlin, from Proto-Brythonic *Mor-ðin (“sea-hill”), from Proto-Celtic *mori (“sea”).

Adapted from Wiktionary (CC BY-SA 4.0)

The story

Its literary history includes the stories of King Arthur and his knights.

Merlin through the years

Babies since 1880
15,968
15,049 boys · 919 girls
Most popular year
1927
405 babies
2025
73
#2,343 for boys · #7,758 for girls
2021–25 vs 2016–20
+18%
Rising
Boys Girls
01002003004001900192019401960198020002025Highest share 1931Boys 35Girls 8.7
Merlin in U.S. Social Security birth records, 1885–2025, per million births of each sex. Years with fewer than five births for a sex are not published and appear as zero. Use the arrow keys to step through years.

Boys, girls and both

The balance of boys and girls given this name has shifted over time. Recent births are 82% boys.

Boys Girls
0%50%100%1900192019401960198020002020
Five-year rolling share of U.S. births. Blank stretches had too few births to read.

Where it’s given

Most at home inIndiana, Tennessee, Texas
FewerMore, relative to births Not published
2025 births by state of birth. Tiles are equal-sized so small states stay visible. Highest rates: Indiana (7), Tennessee (6), Texas (6).

By the numbers

In 2025, this name appeared in 59 U.S. birth records for boys, ranking No. 2,343 among boys’ names. Average annual use for boys was 22.3% higher in 2021–2025 than in 2016–2020. Its largest published annual count for boys was 389 in 1927. It also appeared in 14 birth records for girls in 2025. In 2025, Indiana had the largest reported state-level birth count for boys with this name (7). Published U.S. population figures for this spelling include 8,662 as a first name in 2020; 1,337 as a surname in 2020.

From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.

Merlin’s family of names

In English usage, Merlin has a related form in Marlin. Merlin has a related form in Merlyn. Merlin has a related form in Merlynn.

Walk Merlin’s family in the name graph

MerlinMarlinMerlynMerlynnMerlenMerlonMerlanMerlannMerlinnMerrlinMerllinMerlennMerlunnMerlonnMerlunMyrddinMellinMerlinoΜέρλινMerlínMerlíМерлинマーリンMarzhin

Inner ring: nicknames and forms · outer: across languages.

Hover or tab through the constellation to see how each name is related. Bigger dots are names more people in the U.S. share.

Around the world

Merlin has relatives in 10 languages. Lines run from its Proto-Celtic roots to each of them.

WelshBretonRussianJapaneseProto-Celtic

12 related names in 10 languages. Point at a dot, or tab to the map and use the arrow keys.

Each dot marks where a language is rooted, not where people with the name live today. Bigger dots hold more names. Dots on the border stand for languages further away. Language locations from Glottolog (CC BY 4.0); map from Natural Earth.

Similar names

If you love Merlin, these share its style, era, origin or sound, from outside its own family.

Welsh · Nature

Marvin

“a friend of the sea”

54UncommonEasing

>99% boys

Welsh · Nature

Mervin

“a friend of the sea”

33RareSteady

>99% boys

Welsh · Nature

Merwin

“a friend of the sea”

0Not recently recorded

>99% boys

Celtic · Royal

Arthur

“strong as a bear”

81CommonRising fast

>99% boys

Gaelic · Royal

Lewis

“devotee of the Lord”

62FamiliarRising

>99% boys

Gaelic · Nature

Murray

“the lord of the sea”

33RareRising

86% boys · 14% girls

Scottish · Nature

Clyde

“from the river Clyde”

53UncommonRising

>99% boys

German · Vintage revival

Hugh

“having a bright mind”

54UncommonRising

>99% boys

Sibling ideas

Names that share Merlin’s feel without repeating its first letter or rhyming with it.

A brother for Merlin

A sister for Merlin