Boy name origins & meanings Scottish : Defender of mankind; version of Alexander Boy name variations Alistair Alistaire Alastaire Alister Alaster Alasdair Alaisdair Alaistair Alaister Alasteir Alastor Aleister Allaistar Allastair Allaster Allastir Allysdair Alystair Famous people who gave their babies this name Rod Stewart