Academy graduate Marvin established himself in 2010-11, partnering Danny Graham in a young Watford team under Malky Mackay. His form persuaded Bolton Wanderers to pay £3m for his services on transfer deadline day in January 2012.
Striker Nathan signed in a then club record deal worth £3.25 million from WBA as manager Aidy Boothroyd looked to return to the Premier League at the first attempt. However it turned into a struggle for both player and team.
American defender Jay DeMerit spent six seasons at Watford from 2004 to 2010 after impressing in a preseason friendly with Northwood. He became club captain and played for the USA at the 2010 World Cup.