Booysen is an Afrikaans surname, also spelled Booyze, Booyse and Booysens. It is related to the English surname Boyce and Boysen in other Germanic languages. The Stamvader Boy Booysen was the first of the generation of the Booysen family which was born in Germany and arrived in South Africa in the mid-17th century. He was a resident of Stellenbosch and Drakenstein in the Cape. The genealogy of the family can also be traced back to other stamvaders including Karl Booysen-Brùndolf, Pierre Joubert (Jaubert) and Jean Durand.