I was just viewing a pattern exactly like this one in Easy Four Patch Quilting 1999 Published by House of White Birches - Edited by Sandra L. Hatch, Jeanne Stauffer and in this book it is called a SnowBall Quilt. To me it's nothing like a Snowball and isn't even created like the Snowball I know. But the picture is exactly the same as your quilt...