Family name origins & meanings
- Scottish and Irish : Anglicized form of Gaelic Mac Austain ‘son of Austin’ (see Austin).
- English : from a reduced form of Constant or Constantine.
Exclusive Christmas discount for your expert parenting classes from FamilyEducation — 50% for a limited time only! Click Here to get started.
Costain
Join the Family
Your partner in parenting from baby name inspiration to college planning.
Subscribe