The name McGlasson represents a relatively small Scottish clan, with numerous spelling variations. In addition to pronunciation variants, such as McGlashan, McGlosson, and McGlaston, there were intentional changes in spelling. The surnames Glasson, Glosson, and Meglasson sometimes were adopted in order to avoid discrimination of people with Scottish surnames. One group of McGlassons came from the town of Canonbie in the county of Dumfries and Galloway in Southwest Scotland.