Coehoorn, Menno, Baron van Coehoorn (1641–1704)

Dutch soldier and engineer. He fought and constructed works of defence during the War of the Grand Alliance 1689–97 He surrendered to French forces under Sébastien Vauban at the siege of Namur in 1692, but was present at its recapture in 1695, and was later made a lieutenant general. He commanded a corps in the Duke of Marlborough's army 1701–03, during the War of the Spanish Succession.

In peacetime Coehoorn devoted his time to engineering work, and fortified many towns in the Netherlands. He died suddenly of apoplexy.