Meaning A boy's name of Gaelic origin, it means "Son of Alasdair." Origin of MacAllister Gaelic , Irish Popular Middle Names Eric, Jay, Stephen Pronunciation 🔊 Listen MacAllister Similar Names Mac Ailean MacAdhaimh MacAdhamh Muireach Mac a’bhaird Mac a’bhiadhtaiche Mac Adhaimh Mac Alasdair Mac an Aba Mac an Bharain Year by Year Popularity of MacAllister