
1) Ancient Egyptian woman 2) Coptic Orthodox saint 3) German girl name 
Found on 
https://www.crosswordclues.com/clue/verena

 Verena is venerated as a saint by the Coptic Orthodox Church, by the Roman Catholic Church, and by the Eastern Orthodox Church. According to tradition, she was associated with the Theban Legion and died on the 4th day of Thout (September 14). Tradition states that she was brought up in the 3rd century in the Theban region (modern day Luxor in Uppe...
Found on 
http://en.wikipedia.org/wiki/Verena

Verena is a cultivated variety of potato.
Found on 
http://www.probertencyclopaedia.com/browse/QV.HTM
  No exact match found.