Pieter Johan van Berckel
Pieter Johan van Berckel (January 1725 - 27 December 1800) was a Dutch politician, who served as mayor of Rotterdam and the first ambassador from the Dutch Republic to the United States of America. He also remained part of the government of Rotterdam until 30 January 1788, when he was dismissed by William V, Prince of Orange and the Estates General of the Dutch Republic - he never returned to Rotterdam and remained a refugee, dying in Newark.