Egbert Bartholomeuszoon Kortenaer or Egbert Meussen Cortenaer (1604 – 13 June 1665) was an admiral of the United Provinces of the Netherlands. His second name is also given as Bartolomeuszoon or Meeuwiszoon. All of these are variations on the patronym "Son of Bartholomew". During the Battle of Lowestoft on 13 June 1665 Kortenaer commanded the van and was second in overall command behind Van Wassenaer. He was fatally wounded early in the battle on Groot Hollandia by a cannonball hitting his hip and buried in Rotterdam in a marble grave memorial engraved by a poem of Gerard Brandt: