Alastair
Literal root meaning: “to defend + man”
About the name Alastair
Alastair is a boy name with Ancient Greek roots, literally “to defend + man”. It is related to Alexander, which is where the meaning comes from.
It has a unique feel. In 2025, Alastair ranked #2147 for boys in the US, with 67 babies given the name. Its peak year since 1940 was 2025. Since 2000, 100% of US babies named Alastair were boys.
Etymology
Shares its root with Alexander, which comes from Ancient Greek, meaning “to defend” + “man”.
Name meaning adapted from Wiktionary (“Alastair”, “Alexander”) by Wiktionary contributors, CC BY-SA 4.0.
- US rank 2025
- #2147
- In 2015
- #2600
- Babies in 2025
- 67
Popularity of Alastair, 1940–2025
Latest SSA data: 2025.
Popularity data: U.S. Social Security Administration national baby names (public domain; names given to at least 5 babies of one sex per year).
Names similar to Alastair
Name meanings marked or linked “Wiktionary” are adapted from Wiktionary by Wiktionary contributors, CC BY-SA 4.0; each name page links its source entry.