There are at least eight artists that have used the name Isis:
These are videos from concerts where Isis played, so they may be of other bands that played the concert as well.
Roskilde Festival 2005 Jun 30 - Jul 3, 2005 Roskilde, Zealand, Denmark Added by Concert Archives
Isis / DJ Speedranch / Johnny Truant / 27 Mar 11, 2003 Glasgow, Scotland, United Kingdom Added by John Collins