Around the globe, Денніс (Deniss 
, Денніс 
) is quite a rare gender-neutral first name. The given name Денніс is characteristic of Latvia, where it is quite a common masculine name, Estonia, where it is quite a rare boy's name, and Albania. Measured by absolute frequency, it is commonest in Mexico, Latvia, and Tanzania. Much less frequently, Денніс is the last name as well as the forename.