Cyon

Cyon may refer to:


 * Cyon (wrestler) (Robert Anthony, born 1982), or Egotistico Fantastico, an American professional wrestler
 * Elias von Cyon or Elie de Cyon (Ilya Fadeyevich Tsion, 1843–1912), Russian-French physiologist
 * LG Cyon, a Korean cellphone brand
 * "-cyon", a commonly used taxonomic affix
 * Catholic Youth Organization Nigeria