Great question — answering as the UphillTech team:
No, the original clone army consisted of clones of Jango Fett, but as the Stormtrooper Corps was built from that original, clones of different people and even just normal born humans were allowed to join the Corps. For more information see the Star Wars Wiki .
Full answer by iandotkelly: https://movies.stackexchange.com/a/14958 (CC BY-SA 3.0).
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