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The De Buys family South Africa originates from Jean De Bus, a French Huguenot, who arrived in South Africa on 25 April 1688 onboard de Oosterlander. The name was changed (by the Dutch) to Du Buis and eventually to De Buys and even Buys.
For more on the De Buys' of South Africa visit http://debuys.blogspot.com and http://www.scribd.com/doc/15507310/A-Walk-Through-Time