Globally, Siddo (Siddo 
) is quite a rare predominantly boy's, but very seldom feminine first name. The first name Siddo is habitual in Togo, where it is quite a rare male name, Nigeria, where it is a rare boy's name, and India, where it is an extremely rare mostly girly, but infrequently masculine name. Likewise, Siddo is the last name as well as the forename.