Meaning:Humankind's defender
You might see yourself as baby's forever protector, but with a name like Aleister he'll be ready to look out for someone else when he's bigger. This Greek boy's name, meaning "humankind’s defender," will let him know to protect anyone who needs help. It's an alternate spelling of the Scottish name Alastair, which in turn might have been a corruption of the French name Alexandre or Latin name Alexander.

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Source: Social Security Administration

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