If you're going to lift questions off Wikipedia, you really should read what you've copied before you paste it into your question file.
What Wikipedia actually says is, 'Buzzcocks manager Richard Boon and frontman Pete Shelley have both been credited with suggesting the band name "Stiff Kittens", but the band settled on "Warsaw" shortly before their first gig, a reference to David Bowie's song "Warszawa". Warsaw debuted on 29 May 1977 at the Electric Circus ... '
In other words, the band was never known as Stiff Kittens, as the question suggests. It was just a name that was suggested and passed over. (Anyone who has ever been in a band knows that when choosing a name, you pass over gazillions of suggestions before you find one that everyone likes, or can at least live with.)
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