Europe (abbr. for 歐洲|欧洲[Ou1 zhou1]); European Union (abbr. for 歐盟|欧盟[Ou1 meng2]); surname Ou

ohm (abbr. for 歐姆|欧姆[ou1 mu3]); euro (abbr. for 歐元|欧元[ou1 yuan2]); used in transliteration; old variant of 謳|讴[ou1]

Owen (name); Erwin (name); Irvine, California

euro (currency)

Romeo (name)