I included the all-caps version for clarification in my answer, Liz.
Since the profile has already been created using all-caps, it's basically a moot point as it relates to William's question. I didn't want him to think he needed to change UNKNOWN to Unknown, as that would create an unnecessary redirect (in my opinion, anyway).
Perhaps I should have included a link to the style guidelines for LNAB:
https://www.wikitree.com/wiki/Help:Name_Fields#Last_Name_at_Birth
I haven't used the GEDCOM feature yet, so I don't know if William would have been able to correct the all-caps before he imported/created the profile.
So, until Eleanor's LNAB can be established, no change is necessary.
That's my opinion on the preferred procedure for a profile with the all-caps UNKNOWN. If the official WikiTree policy is to change it to Unknown, please let us know. my fellow WikiTreers; be sure to include a link to that policy!