Here are some Native American potteries that have Hmong designs on it. Please feel free to add (link to pic & name of where it comes from) more in the comment section that you feel fits in with this. I find it amazing that the more we investigate both cultures the more similarities we find.
Ancient Pueblo Peoples (Anasazi) Pottery
Pre-Columbian Marajoara Pottery
Dawenkou (Hmong) Pottery
Here are some pictures to show you the Hmong Patterns. As you can see in the above pictures of the pottery, they have Hmong Patterns on them. Www.Artisansofasia.Com.