Remnants of Dutch presence in the Gold Coast, other than the forts along the coastline, are Dutch surnames which were taken on by the descendants of the children the Dutch slave traders had with their black mistresses. Bossman is a common surname in Ghana, and ultimately derives from the Dutch slave trader Willem Bosman. Other Ghanaian surnames derived from Dutch names include Bartels, Van Dyck, and De Veer. In an episode of "Who Do You Think You Are?", British-Ghanaian actor Hugh Quarshie traced his ancestry to Pieter Martinus Johannes Kamerling, a Dutch official on the Gold Coast.