Based upon the genetics involved I would say that your White Snows are Snow Lavenders. Only one in four would be a Snow Lavender, while the rest would be Snows het Lavender and Snows. Two out of seventeen is within the expected ratio.
I am not sure what they are called at the moment. Ultimate Corns is working with them and has proposed “Glacier” Corn for their common name. It has been thought at one time that Pearls were a result of a Snow Lavender mix, but it seems to be an unpopular theory at the moment.
Most people feel that Opals and Pearls are just Amel Lavenders that are within the normal range of phenotypes within that morph. I have extremely pink Opals and one pure white Opal, that I know are not homo Anery A. The Pearl Opal has more pattern than your “White” Snows have from what I can tell from the photo you posted of them.
Ultimate Corn has not posted photos of their super secret project, but Rick Z has said that his Snow Lavenders appeared to look like Snows, but he did not raise them up to adults. I am not sure how confident you are about the genetics involved in the parent snakes, but is it possible that Anery B is in the mix as well. I think this could be a possibility, since Anery A and B can be floating around in each others morphs. They do resemble Blizzards. I actually can not recall seeing a photo of a known Snow Lavender, that did not look like a Snow.