Wagenborg managed RUYTER on the Dun Cow today
Arrived yesterday from New Holland to load red stone for Terneuzen
Kept off the berth by her fleet mate TRINITY BORG
Regrads
Graham

Michiel Adriaenszoon de Ruyter himself. Cheeky fellow who raided the Medway in 1667.

https://en.wikipedia.org/wiki/Michiel_de_Ruyter

Dutch ships named Bestevaer (grandfather) also refer to him.