a Dutch admiral that entered into Swedish service, becoming a Swedish admiral and a Swedish nobleman under the name Mårten Anckarhielm. He played an important role at the Battle of Fehmarn 1644. Thijssen distinguished himself as Dutch vice-admiral at the Battle of Albrolhos 1631. When the fleet returned to the Netherlands in 1634 he became master-attendant and munitions-master at the Admiralty of Zealand in Vlissingen.
