The tag set shows the following pairings for CNV:

Dympna Wythenshawe/Maddie
Maddie/Gabrielle-Therese Thibaut
Julie Beaufort-Stuart/Maddie Brodatt

I assume the last one is the one you're looking for.

I think the glitch you're running into is that it's not showing up in the drop down menu on the sign up form, correct? That's a known glitch, and the way to get around it is to copy and paste the name in from the tag set.

Let me know if that works.