So long as the business gets something that they can use as a legal identifier, they don't need to care about what is inside it. The whole problem of people no

So long as the business gets something that they can use as a legal identifier, they don't need to care about what is inside it. The whole problem of people not having middle or family names goes away when it's treated as a single field. You don't care about tokenizing the field, because you only ever reproduce that field verbatim. If the user believes a middle name identifier isn't necessary, then it probably isn't. It's only one aspect of the identifiable information used to identify the legal entity of that person anyway. If you have a name, address, possibly CC information, and email, that's probably more than enough to claim they're a customer for whatever legal purpose the business needs.