After more exploration I discovered you can in fact contact the profile manager (Alina) without a paid subscription. When I clicked on "Alina" the next screen provided her full name - Alina Maria Binder - so it is Nicholas Medforth-Mills' wife. The family profile was created on 31 August 2007.
I also found more information about Alina's father Heinz Binder. He is the son of Gheorghe Cucu and his wife Susanna Schopp (umlaut over the o) (12 June 1923 - 12 July 2005). The profile includes photographs of Gheorghe and Susanna.
Susanna was the daughter of Josef Schopp and Susanna Binder. The profile states Josef and Susanna were partners, it does not call them husband and wife. They had several children together.
The profile also provides more information on previous generations of the Cucu, Schopp and Binder lines.
Based on this information it appears Heinz Binder also had Romanian ancestry and took his maternal grandmother's surname.