Volendam (Vollendam means "filled dam") is a town in North Holland in the Netherlands, in the municipality of Edam-Volendam (about 23,000 people). The Netherlands is Dutch (Nederland), meaning the "Low Countries" or "Low Country." The name "Holland" is a province of Netherlands; the names Holland and Netherlands are not interchangeable.
For more on "Phantom Clowns," see Mysterious America (NY: Simon and Schuster, 2006). For more on symbolic criminal behavior, see The Copycat Effect (NY: Simon and Schuster, 2004). This blog has noted other evil clown activity, including incidents and listings, such as a report for 2012, one for 2011, another grouping for 2009, and a top ten list for 2008.