Utility Quilting: Square Amish Waves?

Here are some shots of the quilting that I am trying out on my Bits Quilt.

This is the back of a quilt:

Utility quilting1


It seems to a square version of Amish Waves:

Utility quilting2


Utility quilting3


Any ideas where this quilting came from, or if it has a name? All these examples are from American quilts.

Utility quilting4