Dear Ms.Brown,The Casburn's were origially from France )(Casbourne)The name was changed to Casburn after migrating to England sometime in the 1700s.A large number of Casburn's were early settlers in Eastern Canada. The London, Ontario area.My Father was born there.Both he and his brother served in WWII and his brother served in the Korean war in the Canadian Army.There is a book called the "Freeman's" which documents much of the Casburn history.The only Casburn's I ever met ouside of Canada was a Robert Casburn in San Francisco.He was an Eight cousin to my Father.He and his wife had one deceased child, a U.S. Bomber piolot killed during WWII. The phone directories in the London Hamilton & ST. Catherines Ontario areas have a number of Casburn listings. I hope this is of some help.J.C.