Jan Zwartkruis
Johannes Hermanus Hendrikus "Jan" Zwartkruis was a Dutch manager. He was manager of the Netherlands national team for two periods, coaching the team in 28 matches, including the 1980 UEFA European Football Championship and 1980 Mundialito. He also coached the Trinidad and Tobago for a brief time in the 1980s and the Netherlands Antilles during the 1994 FIFA World Cup qualification round for CONCACAF Caribbean Zone.