Alaister \a-lais-ter, ala(i)-ster\ as a boy's name is a variant of Alastair (Greek), and the meaning of Alaister is "man's defender".

The baby name Alaister sounds like Allister, Alister, Aleister and Alaster. Other similar baby names are Alyster, Allyster, Allistir, Allaster, Allaistar, Alistar, Alester, Alaistair, Alastor, Alasteir and Alistir.