"[The crowd is] the only thing I don’t like about Quidditch."
-- Royston Idlewind (and a reason why Quidditch World Cup fans don't like him) (Pm)
Quidditch player, Chaser for the Australian National Team (1966) and International Director of the International Confederation of Wizards Quidditch Committee (1971-1974) (Pm).
Idlewind was a member of the Austrialian team that won the 1966 Quidditch World Cup. An unpopular appointment as International Director of the ICQWC in 1971, he legislated strict crowd control rules and put in place a wand ban during Quidditch matches. The fan unrest came to a head at the Quidditch World Cup in 1974, when spectators brought wands disguised as noisy musical instruments to a packed Syria-Madagascar final match in defiance of his rules. After he was razzed by a stadium of wizards carrying these Dissimulator wands, Idlewind resigned (Pm).
Other canon notes and references
When interviewed by the Daily Prophet after the chaos following the 1994 Quidditch World Cup, Idlewind said that "....a wand ban doesn’t look so stupid now, does it?" (Pm)
Royston may come from Royston in Hertfordshire (from Old French croiz "cross" and the Germanic name Royse, therefore "Royse's cross" or "Royse's stone"); or from Royston in West Yorkshire (Domesday Book "Rorestun" meaning "Hror's settlement") (Internet Surname Database). There is also a place called Royston Island in South Australia (Wikipedia).
Idlewind is a combination of idle meaning "not working, not active, without purpose" and wind meaning "moving air" (Oxford English Dictionary).