[ syll. al-las-ter, all-ast-er ] The baby boy name Allaster is of Old Greek origin, and it is used mainly in English and Scottish. Allaster is a variant form of the English and Scottish Alistair.
See also the related category greek.
Allaster is not widely used as a baby name for boys. It is not in the top 1000 names.
Baby names that sound like Allaster include the English Alastor and the English Aleister.