There are at least three artists called ZAO:
These are photos from concerts where Zao played, so they may be of other bands that played the concert as well.
Hellfest 2000 Jul 1 - 2, 2000 Syracuse, New York, United States Uploaded by Michaela Morgan
Zao / Luti-Kriss / Hopesfall Jan 28, 2000 Myrtle Beach, South Carolina, United States Uploaded by Foreverking