a few suggestions:
ask the embassy of Romania for help.
Contact: Dorotheenstrasse 62 - 66, 10117 Berlin
Call center Konsularabteilung: +49 30 21239555
You can search for her name in Romanian phone books.
A list provided by Deutsche Telekom: http://tinyurl.com/y82dk8ok
(German Language, but you will handle that by only using the links).
You ask members of special communities. A list of communities given by the Romanian embassy in Germany: https://berlin.mae.ro/de/node/525
Use search options of internet and social media services e.g. Facebook, Instagram, Google (Images). A starting point could be Whitepages Romania: http://tinyurl.com/ybf7q99z