A Quidditch referee from Germany (2014).
The referee for the final match of the 2014 Quidditch World Cup between Brazil and Bulgaria, Junker ruled that the hit to Seeker Viktor Krum's head by Brazil's Rafael Santos Beater's bat was an accident (Pm).
Herman is a Germanic name meaning "army man". It comes from heri meaning "army, warrior" plus man (Baby Namespedia).
Junker comes from Middle High German Juncherre, which derives from jung and Herr) and means "young lord or nobleman" (Wikipedia).
Hermann Junker (1877-1962) was a German archaeologist specialising in Egyptology.
From the Web
Screenshots of the Daily Prophet's coverage of the 2014 Quidditch World Cup: http://imgur.com/a/AXutv