Geddy is the lead singer
(yes, at the same time!) for Rush
Geddy has a fairly high singing voice, similar to that of Yes' Jon Anderson. Earlier in his career, he sang in the screechy 70s "Hair rock" style, but had to tone it down after a bout with throat cancer.
It is whispered that Geddy's real name is Gary, but Alex Lifeson's Mom, in whose garage they practiced, pronounced it that way.