It’s more accurately spelt Voodou, Vodou or Vodun. Just as long as it sounds right. In Brazil it is known as Candomble, and Obeah in Jamaica.
It came originally via the African slave trade — folk plucked from their native lands took their Gods and beliefs with them. Their traditional beliefs were mixed and stirred with the prevailing Roman Catholic ritual.
Voodou became a powerful influence, especially in Haiti. It also spread to other islands — and other deities have drifted in from the nearest parts of South America. This mix-and-match process is known as Syncretism. Sorry about that.
’Voo’ means Introspection, ‘Dou’ means the Unknown. It has little to do with Hollywood zombies and pin-ridden dolls lurching all over the place. Voodou does have its unsavory aspects, but the populist Hollywood version is a highly sensationalized fiction based on stereotype and brute ignorance. Also, there’s plenty of opportunity for drumming and rumming the night away.