I live just north of the cutoff for southern varieties, and that might be why none of those sound familiar. But if they are like the ones I know, one thing to verify is that at least two of the varieties bloom/crop at the same time to insure you have varieties that pollinize each other.
If some of them bloom/crop earlier or later in the season, you can spread out the harvest/blueberry season by getting those different varieties.
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