In this way, the anthropologist and Garifuna historian Belizean Sebastian R. Cayetano says African ancestors of the Garifuna are ethnically West African "specifically of the Yoruba, Ibo, and Ashanti tribes, in what is now Ghana, Nigeria, and Sierra Leone, to mention only a few." To Roger Bastide, the Garifuna almost inaccessible fortress of Northeast Saint Vincent integrated constantly to Yoruba, Fon, Fanti-Ashanti and Kongo fugitives. These African origins are true at least in the masculine gender. For the female gender, the origins comes from the union of black slaves with Caribs. Based on 18th-century English documents, Ruy Galvao de Andrade Coelho suggests that came from Nigeria, Gold Coast, Dahomey, Congo "and other West African regions".