MallowbyNames

Alaster

uh-LASS-ter · Variant of Alastair, the Scottish form of Alexander, meaning 'defender of men'.

2025 rank (boys)
#6,446
Babies named in 2025
13
Peak popularity
2024
2025 frequency
1 in 131,390 boys
Usually for
Boys
Trend
Rising since 2004

Rising since 2004, #6,446 for boys today.

Popularity of Alaster since 1998

Babies named Alaster per year in U.S. Social Security records.

51116200020102020Most births 2024Boys
Data table (by decade)
DecadeBoys
1990s5
2000s22
2010s49
2020s62

Meaning & origin

Alaster is a Scottish variant of Alastair, the Gaelic form of Alexander. Its meaning, 'defender of men', ties it to a long tradition of strong, classic names. In the United States, Alaster first appeared on record in 1998 and has been gradually rising in use, with a peak rank of 6,446 in 2025. The name shows a consistent upward trend since 2004, indicating growing interest among parents looking for a distinctive yet traditional Scottish name. While it has not yet cracked the top 5,000, its rarity and melodic sound make it an appealing choice for those seeking something uncommon. No U.S. state reports it as a top name, reflecting its niche appeal. Alaster offers the familiar nicknames Al and Ally, balancing uniqueness with approachability.

Alaster is a Scottish variant of Alastair, itself the Gaelic form of Alexander. The name Alexander comes from the Greek Alexandros, derived from alexein 'to defend' and aner 'man', thus 'defender of men'. Alaster has been used in Scotland for centuries, though it remains less common than Alastair. Its modern usage in the United States has been recorded only since 1998.

Nicknames & variants

Nicknames: Al, Ally

Variants: Alastair, Alistair, Alister, Alasdair

Sibling names for Alaster

Names that share Alaster's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

A is for Alaster, our favorite little boy.

A is for Alaster…”

In a Mallowby alphabet book, Alaster's letter becomes Alaster's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Alaster's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What is the meaning of the name Alaster?
Alaster is a Scottish variant of Alexander, meaning 'defender of men'.
How popular is the name Alaster?
In 2025, Alaster ranked 6,446th in the United States, with an estimated 1 in 131,390 baby boys given the name.
Is Alaster a boy's name or a girl's name?
Alaster is traditionally a masculine name, derived from the male name Alexander.