Dutch Captain: Claes (Nicolaes) Janszoon (or Janssen)

Claes (or Nicolaes) Janszoon (or Janssen) served the Admiralty of Zeeland. Dr. De Boer mentions him in conjunction with the campaign leading up to the Battle of the Downs (as Claes Janssen). He definitely fought in the Battle of Portland. As Jodocus Hondius mentions the Leeuwen in his account of the battle, he very likely commanded that ship in the battle. In 1653, he commanded the ship Leeuwen (or Leeuwin), which was Jan Everten's flagship for a period in the spring of 1653. Sources:

1. C. T. Atkinson, Ed., The First Dutch War, Vol.IV, 1910.
2. James C. Bender, unpublished manuscript “Dutch Captains”, 2005.
3. James C. Bender, unpublished manuscript "Dutch Ships 1600-1700", 2005.
4. Jodocus Hondius, Onstelde-Zee, Oft Zee-Daden, 1654.