It disadvantages the kids when they are adults.
Cutesy made-up names like Kayeen and Roomay do not help them get along in the real world.
I don't know, they sound like they may be traditional African names. I work with a black gentleman who's name is Kibwe, and his daughters name is Akilah.
They may sound made up, but both are traditional African names. His is Swahili for "blessed", and hers is Swahili for "intelligent". There is absolutely NOTHING wrong with taking a name from his racial culture...it's no different than someone of Irish descent preferring to name their kid Patrick, someone of Italian descent preferring Antonio, or someone of Spanish ancestry preferring Jose.
Now if they were named Laquonda, Shauqnda, Tanique, or ChamPoo, you'd have a point.