The tag said "Martha White,"
which isn't in the IOR database; I was able to find a Marsha White, which looks a lot like this, so presumably there's been a typo somewhere along the way. These things will happen. It is sometimes frustrating to be the only person who cares, though.
The flower's nice, at least.
Paphiopedilum Marsha White = Paphiopedilum Diana Broughton x Paphiopedilum Langley Pride (Ref.)