"Obeah" refers to spiritual folk practices that were derived from West African sources. The W. E. B. Du Bois Institute databasesupports obeah being traced to the "dibia" or "obia" meaning "doctoring" traditions of the Igbo people. Specialists in "Obia" (also spelled Obea) were known as "Dibia" (doctor, psychic) practiced similarly as the obeah men and women of the Caribbean, like predicting the future and manufacturing charms. In Jamaican mythology, "River Mumma", a mermaid, is linked to "Oya" of the Yoruba and "Uhamiri/Idemili" of the Igbo.