Celio \ce-lio\ as a boy's name is of Latin origin, and the meaning of Celio is "heaven".
For more information, see also the related name Cecil.
Baby names that sound like Celio are Sela and Selah. Other similar baby names are Celso, Selmo, Cecilio, Ceri, Cleo, Deli, Eelia, Julio, Selim, Selig, Zelig and Zelik.