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Alasdair

#3,849 in 2025Boys' name

Form of Alexander

Alasdair has been given to 525 babies in the U.S. since 1989. In 2025 it ranked #3,849 of 13,926 boys’ names in use. Its peak year was 2021, with 37 recorded.

Babies named Alasdair, 2025

1 in 118,000

Alasdair over time, 1880–2025

Boys
01020304018801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Alasdair: meaning, origin, and history

Form of Alexander

Scottish Gaelic and Ancient Greek

What Alasdair means

Alasdair is a form of Alexander.

Meaning behind the documented name family

Alasdair is a form of Alexander. Alexander has more than one origin or interpretation.

Origin, language, and formation

Alasdair is used in English and Scottish Gaelic. Its origins include Scottish Gaelic and Ancient Greek.

Related names and everyday forms

Related names include Alexander.

Pronunciation and spelling

In English, Alasdair is pronounced /ˈælɪsdɚ/.

American usage and historical context

In the United States, 525 boys were recorded with the name Alasdair between 1989 and 2025. Its highest annual count was 37 in 2021; its best national rank was #3,152 in 2015.

Over 5 years its rank rose, from #4,541 in 2020 to #3,849 in 2025. Over 10 years its rank fell, from #3,152 in 2015 to #3,849 in 2025.

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 Alasdair?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 118,000
28 of 3,315,165 births
Among boys only
1 in 61,000
<0.01% of boys
Rank, 2025
#3,849
of 13,926 boys’ names in use
Coin-flip room size
82,069 kids
Even odds of a second one

Where Alasdair 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 2025 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 82,069 children born in 2025 and it's an even bet that one of them is another Alasdair. In a class of 30 the chance is Under 1%.

When Alasdairs were born

Half of everyone ever recorded as Alasdair was born before 2015 — so the typical Alasdair is around 10 today.

Median birth year
2015
About 10 years old
Biggest decade
2010s
42.9% of all use
Born in the last 25 years
89.3%
A modern name
Recorded since 1950
525
People you could plausibly meet
Choose a decade

2010s — 42.9% of all recorded uses (225).

Is Alasdair 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
−154
Places dropped
Rank vs 5 years ago
+692
Places climbed
Rank vs 10 years ago
−697
Places dropped
Births vs 10 years ago
0.78×
Fewer babies than then
Share of its own peak
75.7%
Peak was 2021 (37)
Years since peak
4
Years
Year-to-year steadiness
Volatile
39.4% average annual change
Best rank ever
#3,152
2015

Spellings of Alasdair

Alasdair is not the most common spelling — Alistair is, with 55.0% against Alasdair's 7.1%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Alasdair is used

Across 1910–2025, Alasdair was most concentrated in California — about 1 in — boys, against 1 in 968,483 across all states with data.

00 per 100,000

Most concentrated

  1. 1California1 in —

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Alasdair has too little recent state data to map, so this covers all years from 1910.

Alasdair around the world

Where Alasdair ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2025
    #1,705
    in 2025
  • Scotland
    1974–2025
    #298
    in 2025
  • Northern Ireland
    2013–2013
    #398
    in 2013
  • Ireland
    1979–2022
    #779
    in 2022
  • Canada
    1992–2024
    #2,328
    in 2024
  • South Australia
    1951–2006
    #657
    in 2006

Popularity data from Office for National Statistics, National Records of Scotland, Northern Ireland Statistics and Research Agency, Central Statistics Office, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS, NISRA data under Open Government Licence v3.0. CSO, CBS SA data under CC BY 4.0. StatCan data under Statistics Canada Open Licence.

Alasdair by the numbers

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

As a boy's name

Rank in 2025
#3,849
Trend vs 5 yrs ago
Up 692
Best rank ever
#3,152
2015
Peak year
2021
37 that year
First recorded
1989
Last recorded
2025
All-time count
525
Count in 2025
28

Names similar to Alasdair

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

AlastairAlastorAlassaneAladdinAlanzoAlarikAlakaiAlasterSinclairAlarickAlazarAlaminAlanteNirvairAlansonZubairAlaaAlakayZuhairAlistairAlamAlanoAlastarSyair

Sibling names for Alasdair

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

Explore around Alasdair

Top names of 2021, Alasdair's peak yearThe 2020s in fullOther names that peaked in 2015Boys' names starting with AAlexander Variations & NicknamesScottish Boy NamesScottish Names