Alasdair is a boy's name of Gaelic (Scotland) origin meaning “Defender of mankind; a strong and noble warrior..” It has 3 syllables, giving it an elegant, melodic rhythm. Common nicknames include Al, Aly, Dair. As of 2026, Alasdair ranks #894 among boys' names in the United States and has held a steady level of popularity. Its highest US ranking was #748 in 1989.
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ah-LAS-dair
Phonetic spelling
Currently #894 among US baby names.
* Based on US Social Security Administration birth-registration data
Alasdair means “Defender of mankind; a strong and noble warrior..” It is a boy's name of Gaelic (Scotland) origin.
Alasdair is pronounced ah-LAS-dair.
Alasdair is most commonly used as a boy's name.
Alasdair currently ranks #894 among boys' names in the United States.
Popular nicknames for Alasdair include Al, Aly, Dair.
Middle names that pair well with Alasdair include Alasdair Fergus, Alasdair Ewan, Alasdair Ruaridh.
Other Gaelic (Scotland) names you might love
“Red king; associated with leadership and nobility.”
“God is gracious; a Scottish form of John.”
“Defender of mankind; a strong and noble warrior. (variant of Alasdair)”
“Cian means 'ancient' or 'enduring'. It conveys a sense of strength and resilience, often associated with historical figures in Irish and Scottish lore. (variant of Cian)”
“Cian means 'ancient' or 'enduring'. It conveys a sense of strength and resilience, often associated with historical figures in Irish and Scottish lore.”
“Red king; associated with leadership and nobility. (variant of Ruaridh)”
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