Esterhuysen Monument, 19 Adrienne St Morningside – Sandton’s first monument dedicated to the Esterhuysen Family. Close to are the graves of Voortrekkers Jan Christoffel Esterhuysen and his wife Maria Magdalena. Jan,s mother was the sister of Andries Pretorius, the Voortrekker leaderThey settled here at their farm Zandfontein in 1836. Now part of the Sandton Municipality.