Here are some statistics concerning the surname Slack and a list of some of the the most common names in South Africa that contain it.
Frequency: 0.0016%
Approximate number of South Africans that have this surname: 832 MD5 Code: 3561f3a3c5576e2ce0dc0d1e268bb9b2 SHA1 Code: 430b38bf6daa7f9164b164b2ffd540b5a3afe2fd