At least 4 artists with such name existed so far
Band 1* American Band:
Band 2** London Based Band
Band 3*** Citizens - Glaswegian band
Band 4**** Ska-core band from PA, USA.
Band 5***** No wave/alternative band from Manchester, UK

(*Band 1)As Understood by Guitarist, Thom Loubet.

In 2002, frontman Mark and I played together for the first time in a cramped NY rehearsal studio with the experimental funk octet, Earthdriver. Then, Mark asked me to play guitar on his own project. I went way up to the Bronx with a bag of effects and no idea what to expect. What I found was the thing I’d been practicing for since I was eleven.

Jason and John (the rhythm section) hopped on board next, lending their unique, Oregon spawned pulse to the project. Lastly, Citizen Katherine joined us with her laptop, Rhodes and voice. Bringin' the Science! —
AND THEN THERE WERE FIVE...

We’ll be the first ones to tell you this band goes a lot of places sonically. It’s who we are as a group. We’ve all been around the block, fronting the half-formed or riding along as sidemen in sidecars. It was fun, and it made us good. But this is ours. This is a fusion of everything we’ve learned, and a chance to play only what we love.

The Citizens Are:
Mark Lesseraux (vocals, keyboards) - Thom Loubet (guitars) - Jason Dimatteo (bass) - John Bollinger (drums) - Katherine Miller (keyboards, mac laptop, vocals)

[From citizensmusic.com]
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(** Band 2)Based in London England, comprising:
Charly, voice, 6 strings, Englishman.
Tom, 4 strings, Australian.
Guillaume, bangs things, Brasilian.

http://www.myspace.com/thecitizensuk
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(***Band 3)Citizens are a Glaswegian three piece playing Ebullition-style hardcore in the vein of Yaphet Kotto et al.

http://www.myspace.com/citizensuk

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(*****Band 5)
Formed late 2008 in Manchester, Citizens are Will Wright, Matt Hattersley, Jack Armitage, Amy McGowan and Philip Boucher.

Citizens’ make tropical nowave with pop ‘hooks’.

http://www.myspace.com/thisiscitizens
http://www.last.fm/music/The+Citizens/_/WE'VE+READ+THE+BOOKS