Zombi is the name of a snake-deity in some cults of West African Vodun and Haitian Vodou (Voodoo). Zombi is a Creole word, thought to be derived from Nzambi, supreme god of the Bacongo people of Angola

Angola

Angola, officially the Republic of Angola , is a country in south-central Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean with Luanda as its capital city...

. The deity is connected with water and appears in different impersonations, one being Zombi-Damballah, the rainbow serpent.