There are at least three bands with this name: 1) suffix is/was a screamo band from Chicago. The band members have started new projects Ittō , Coping, and lord snow http://suffixchicago.com
or
http://www.myspace.com/suffixchicago 2) SuffiX is a hard-rock / metal band, originating from Leiden, The Netherlands. The band SuffiX is an energetic five man metal formation, from Leiden, The Netherlands.

Read more about Suffix on Last.fm.