There are more artists with this name: 1. Koen was the precursor name for the New Bedford, Massachusetts punk rock band Smackin' Isaiah before their final name change to A Wilhelm Scream. Koen formed in 1994 merging members from two separate bands, the line-up consisted of Nuno Pereira as vocalist, Trevor Reilly as drummer, Jonathan Teves as bassist, John Carvalho as rhythm guitarist and Mat Demelo playing lead guitar and trumpet. The band released one cassette titled "The Big Fall..." before their name change to Smackin' Isaiah in 1997.