You don't want names of popular tv shows, ones with numbers, and you probably don't want something common like "Kevin" or "Nick."
Both "Kevin" and "Nick" would be perfectly valid names, as would "Ziro", "Twinny", "Raven" etc. be. Examples of bad names would be "Ipewpewandyouqq", "Asdhagsd", "Immortalgod" and so fourth.
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