Derk Anton Laurens Jansz,and sisters Anna Catherina aka Cato and Jacoba Johanna Helena aka Lena and Koos). Other siblings in the family, born after this photo was taken are, Jan Hendrik, Antonie, he was born 1-30-1881 and died 2/20/1881, Willem Christian Pieter II, Helena Berendina, Henriette Louise Jansz aka Jet Pronounced Yet and Laurance Johanna Jansz aka Annawcp. See pedigree chart.