What is "trekboer"

In the history of Southern Africa, the Trekboere (now referred to as Trekboer in English) were nomadic pastoralists descended from mostly Dutch colonists, French Huguenots and German Protestants in the Cape Colony (founded in 1652). The Trekboere began migrating into the interior from the areas surrounding what is now Cape Town, such as Paarl (settled from 1688), Stellenbosch (founded in 1679), and Franschhoek (settled from 1688), during the late 17th century and throughout the 18th century. The Trekboer included mixed-race families of partial Khoikoi descent who had also become established within the economic class of burghers.