Jacob Bicker

[4] Jacob's oldest brother Andries Bicker ruled the city administration for a long time and was mainly supported and carried by him and their other two brothers Cornelis and Jan Bicker, his uncle Jacob Dircksz de Graeff and his cousin Cornelis de Graeff.

[1] In 1643 Jacob Bicker inherited the castle and estate of Engelenburg near Herwijnen from his relative Pieter Dircksz Graeff.

[8] In the 1640s Jacob Bicker belonged to the Bickerse ligue, which opposed Stadholder Frederick Henry, Prince of Orange.

Bicker owned country houses in Baarn and Soest: 'Den Eult' and 'Pijnenburg',[8] and nl:Kasteel de Hooge Vuursche.

[14] Through their work on the Amsterdam City Council and the Dutch East India and West India Company, the Bickers gained enormous influence on politico-economic self-determination in the young Dutch Republic due to the city's position of economic power within the Republic.