Basically, the correct pronunciation is Ee-NOH-ay Now-ya, or Na-oh-ya if you are trying to enunciate each syllable clearly.
How does Thandie Newton pronounce her name?
In a tweet, Thandiwe (pronounced tan-dee-way) explained that she has been known as “Thandie” for the past 30 years, after the anglicized misspelling of her name was used in the credits of her debut film Flirting.