Dutch Captain: Cornelis Melcknap

This is based on my translation of the listing in Dr. De Boer's book Tromp en de Armada van 1639:

Cornelis Melcknap was a convoyer of the admiralty of the Noorderkwartier. He seems to not have been present in the early fighting. He first came to the fleet on October 2nd [1639]. He must have been experienced, as Tromp had him present, as well as Van Galen and Houtebeen, in the council of war. Possibly a nickname plays a part, and he only appears to be listed instead of a well-known commander.