All Van Dorstens globally have been inventoried based on Facebook. It contains totally 367 registrations (165 Zwartsluis, 132 Bramsche/Leiden, 30 Neuenhaus, 13 Java, 3 Steenwijk, 15 other, 9 unknown). The family trees of Bramsche/Leiden and Zwartsluis are almost completely detailed. Later this year the website will be completely updated and structured based on still existing trees. Besides the more unknown branches will be chased and all related companies investigated.