The area they came from has been listed as Poland, Ukraine, Ruthenia, Austria, Hungary, Australia, and Scotland. The Dyki surname is native to an area that was part of the Austria-Hungarian empire called Ruthenia. This area is located on the borders of present day Poland and Ukraine.

Therefore, depending on the person, you may see all of these variations. Most of them came from Ruthenia. Check Wikipedia for a really good history of the region.