Alyster \a-lys-ter, al(y)-ster\ as a boy's name is a variant of Alastair (Greek), and the meaning of Alyster is "man's defender".

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