Hi Cneos,
although the plant comes not directly from Roellke, I am almost sure he/they did the crossing.
Roellke ist one of the most renowned orchid gardeners in Germany, and it is not just one person but a whole family. They are heavily invovled running on of the two orchid organisations in Germany.
Moreover, he is one of the few how does his ownn seedings.
The name of the parent "Sennezauber" (Senne magic) refers to the local region "Senne" where Roellke is located.
Unfortunately, the link to Ascocenda Sennezauber is dead now. But by googling you may have access to the cache.
The link is:
http://www.roellke-orchideen.de
And, please feel free to ask any questions, even via PM, okay?