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Surname Seya (セヤ , Seya ) , globally, is quite a rare cognomen. The family name Seya is characteristic of Ivory Coast, where it is a rare surname, Zambia, and Sri Lanka. In absolute terms, it is the most numerous in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, Ivory Coast, and South Africa. Likewise, Seya is the forename as well as the last name.