"[Smackhammer] risked collision with hefty Liechtenstein Chaser Willi Wenzel to tweak the Snitch"
-- match report USA v Liechtenstein, Daily Prophet, 8 June 2014 (Pm)
Willi Wenzel was a Chaser for Liechtenstein’s National Team at the 2014 Quidditch World Cup.
During the Quidditch World Cup tournament of 2014, Wenzel was celebrated during Liechtenstein's three-day match against Chad for taking two Bludgers to the head and still scoring a goal from sixty yards away (Pm).
The US team's Seeker caught the Snitch millimetres away from Wenzel's ankle in their quarter-final match, which they lost by 450 points to 290. Exuberant American fans kidnapped Hans the Augurey, the Liechtenstein team mascot, during the ensuing celebrations, causing an international incident (Pm).
Other canon notes and references
Willi is short for Wilhelm, deriving from the Germanic name Willahelm (wil "will, desire" and helm "helmet, protection") (Behind the Name).
Wenzel is usually a first name of German and Czech origin meaning "praised with glory" (Wikipedia). Two Olympic athletes from Liechtenstein with the same surname are Andreas Wenzel and Hanni Wenzel.
From the Web
Screenshots of the Daily Prophet's coverage of the 2014 Quidditch World Cup: http://imgur.com/a/AXutv