There appear to be multiple Butter families that are generally unrelated to each other:
- Butter family of England (in Essex) and the United States of America, and perhaps other members of the Commonwealth of Nations
- Butter/Buttar family of Scotland (in Perthshire, now Perth and Kinross) and perhaps Ireland and the United States of America; see also http://www.geni.com/surnames/buttar
- Butter family of Germany