Gender
Origin
- English
- Defender of mankind. Variant of Alexander
- Gaelic
- Defends mankind; variant of Alexander
Syllables
3
Alternate Spellings and Variants of Alasdair
Pronunciation
a-las-dair, al(a)-sdair
Popularity in the USA
- Boys: peak in 2021 (rank #3176, 37 births); most recent 2025 (rank #3848, 28 births)
| Year | Boys |
|---|---|
| 2025 | 28 |
| 2024 | 30 |
| 2023 | 30 |
| 2022 | 21 |
| 2021 | 37 |
| 2020 | 21 |
| 2019 | 19 |
| 2018 | 23 |
| 2017 | 21 |
| 2016 | 22 |
Top girl names · Top boy names in the USA (2025)
Source: U.S. Social Security Administration (SSA), national baby names data (public domain). This site is not affiliated with or endorsed by the SSA. Data years: 1880 to 2025. Original data
Popularity in England and Wales
- Boys: peak in 1996 (rank #335, 71 births); most recent 2025 (rank #1704, 15 births)
| Year | Boys |
|---|---|
| 2025 | 15 |
| 2024 | 16 |
| 2023 | 16 |
| 2022 | 20 |
| 2021 | 17 |
| 2020 | 18 |
| 2019 | 13 |
| 2018 | 14 |
| 2017 | 14 |
| 2016 | 23 |
Top girl names · Top boy names in England and Wales (2025)
Source: Office for National Statistics (ONS), Baby names in England and Wales. Contains public sector information licensed under the Open Government Licence v3.0. Data years: 1996 to 2025. Original data · Licence
Popularity in Ireland
- Boys: peak in 2022 (rank #745, 3 births)
| Year | Boys |
|---|---|
| 2025 | – |
| 2024 | – |
| 2023 | – |
| 2022 | 3 |
| 2021 | – |
| 2020 | – |
| 2019 | – |
| 2018 | 3 |
| 2017 | – |
| 2016 | – |
Top girl names · Top boy names in Ireland (2025)
Source: Central Statistics Office (CSO), Ireland, Irish Babies' Names (tables VSA50 and VSA60), licensed under CC BY 4.0. Changes: spellings that differ only by accents (for example Rian and Rían) are counted together. Data years: 1964 to 2025. Original data · Licence
Popularity in Scotland
- Boys: peak in 1984 (rank #67, 99 births); most recent 2025 (rank #298, 12 births)
| Year | Boys |
|---|---|
| 2025 | 12 |
| 2024 | 17 |
| 2023 | 27 |
| 2022 | 11 |
| 2021 | 21 |
| 2020 | 18 |
| 2019 | 23 |
| 2018 | 29 |
| 2017 | 35 |
| 2016 | 23 |
Top girl names · Top boy names in Scotland (2025)
Source: National Records of Scotland (NRS), Babies' First Names. © Crown copyright. Contains public sector information licensed under the Open Government Licence v3.0. Data years: 1974 to 2025. Original data · Licence
Popularity in Northern Ireland
- Boys: peak in 2013 (rank #398, 3 births)
| Year | Boys |
|---|---|
| 2025 | – |
| 2024 | – |
| 2023 | – |
| 2022 | – |
| 2021 | – |
| 2020 | – |
| 2019 | – |
| 2018 | – |
| 2017 | – |
| 2016 | – |
Top girl names · Top boy names in Northern Ireland (2025)
Source: Northern Ireland Statistics and Research Agency (NISRA), Baby Names. © Crown copyright. Contains public sector information licensed under the Open Government Licence v3.0. Data years: 1997 to 2025. Original data · Licence