Raisin in the Sun

If you're referring to the TV movie which was redone in 2008, "A Raisin in the Sun" with lead actor Sean 'Puffy' Combs ...
there is an actor by the name of David Oyetokunbo Oyelowo, who played character Joseph Asagai. You have that backwards.

Here's the biographical link to the actor: http://www.imdb.com/name/nm0654648/

"While a guest on "Fresh Air," David Oyelowo told interviewer Terry Gross that his father was a member of a royal family in Nigeria, and his last name literally means 'a king deserves respect'."

David starred as Martin Luther King Jr. in Paramount's drama "Selma".