No such thing. At least not in the way you're thinking
It's a result of a lot of rich foreigners that migrated to Haiti and essentially became Haitian over decades of the families being there. Other part is some of the black mofos who have money being attracted to and marrying mulattos.
Remember when German, Syrians and others were moving to Haiti by the bunches in the mid 1900's Haitians made it illegal for foreigners to OWN land in Haiti. The purpose of said law was to prevent foreigners from coming and buying up all the property while leaving the locals unable to compete in their own land. We've seen how that worked out in some places. See parts of the Bahamas. See Turks and Caicos islands. See Costa Rica.
To circumvent that law many of these foreigners just married Haitian women. Them being white and middle-eastern, they mostly gravitated to.... the lighter-skinned Haitians and mulattos. Thus why you see many Haitian families with german last names and middle eastern last names like Scutt, Acra, Mayher and also including my own last name.
My dads great grandad moved to Haiti from Bangladesh. Thus why many people see my last name on my resume and think I'm indian... only to see a black man show up like
"Sak ap fèt, chef?" 
