"You'd think even Muggles could think up a better game than golf"
-- Sidney Todd interviewed in the Daily Prophet (DP3)
The given name Sidney derives from the Old English surname Sidney meaning "wide island" (sid "wide" and eg "island") (Behind the Name).
Todd is an English and Scottish name deriving from the Northern Middle English nickname tod(de) meaning "a fox" (Internet Surname Database).
Although the date printed on the Daily Prophet Newsletter DP3 is 1 June 1999, the timeframe for that event is 1992-1993.