Eureka, I think I've got it.
I just reaad an article about a guy named Darien Dash who is starting some type of computer network company. They state in the article that he enlisted the help of his sister, actress Stacey Dash and his cousin, record CEO Damon Dash. So.....Stacey and Damon are cousins, not brother and sister.
Here's the link:
http://www.washtech.com/news/software/6215-1.html