Flaherty isn't a common black name.
Colin Ferguson isn’t a common black name either. He is black, however. http://en.wikipedia.org/wiki/Colin_Ferguson_(mass_murderer)
Flaherty is not black: http://en.wikipedia.org/wiki/Colin_Flaherty
“Flaherty isn’t a common black name.”
Actually a lot of black americans have Irish last names.
Here’s a funny story, I once met a woman with my mom’s exact name which even though she was 1/2 Irish (her mom) and 1/2 german (her dad), due to her marriage was a very, very common Irish-type name. The woman I met was black!