Urquhart is the Captain of the Slytherin Quidditch team during the 1996-97 season. His position on the team is as a Chaser. Before their match against Gryffindor, Urquhart tries to injure Harry Potter’s hand by squeezing too tightly. During the game, his first goal attempt against Ron Weasley is saved and Slytherin went on to lose the match (HBP14).
Urquhart is a Scottish clan surname originating from the Barony of Urquhart on Loch Ness near Inverness. The name may be derived from Gaelic orchar or urchar ("a spear or stone thrower") (Internet Surname Database).
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Harry Potter Wiki: Urquhart