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Across the world, Collis (Collis , Коллис , كوليس) is quite a rare predominantly male, but scarcely female first name. The first name Collis is characteristic of Barbados, where it is quite a rare male name, the United States, where it is a rare predominantly masculine, but very infrequently feminine name, and Nigeria, where it is a rare masculine name. Measured by absolute frequency, it is commonest in the United States, Nigeria, and South Africa. More prevalently, Collis is the last name as well as the forename.