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Around the globe, Cơ (Cœur , Cơ ) is quite a rare gender-neutral first name. The given name Cơ is characteristic of Northern Africa, particularly Algeria, where it is quite a rare mostly feminine, but uncommonly male name, Tunisia, where it is quite a rare epicene name, and Morocco, where it is a rare epicene name. Measured by absolute frequency, it is commonest in Algeria, Vietnam, and Tunisia. Much less frequently, Cơ is the last name as well as the forename.
Cơ is also a name for the fictitious and mythical characters: .