There are 5 known bands who use the name Ice Age: 1) Most well-known on last.fm: the progressive rock / metal Ice Age, founded in the early 90s.
2) Swedish Female Heavy Metal / Thrash Metal band active mostly in the 80s.
3) Hardcore band from NY. The band consists of (former) members of This Is Hell, Up The Fury, Soldiers, etc.
4) Young band from Copenhagen. They spell Iceage in one word. (www.last.fm/music/iceage)
5) Gothic Rock band from Germany. Released one cassette in '92.

Read more about Ice Age on Last.fm.